Remove deprecated use of Compile to work with Gradle 2.0+

[rwinch]

The class Compile was deprecated and will be removed in Gradle 2.0 (it is
already removed in the release canidate).

Instead we should use JavaCompile.

[rainmore]

Can't use 1.1 releases (1.1.0.RELEASE and 1.1.1.RELEASE) on gradle 2.0-rc-1. However, 1.0.2.RELEASE is still working on it.

I can't wait for commit 05df8e0

------------------------------------------------------------
Gradle 2.0-rc-1
------------------------------------------------------------

Build time:   2014-06-06 07:02:41 UTC
Build number: none
Revision:     b6ead6fa452dfdadec484059191eb641d817226c

Groovy:       2.3.2
Ant:          Apache Ant(TM) version 1.9.3 compiled on December 23 2013
JVM:          1.8.0 (Oracle Corporation 25.0-b70)
OS:           Mac OS X 10.9.3 x86_64

with following exception

 Exception is:
org.gradle.api.GradleScriptException: A problem occurred evaluating root project 'boot'.
    at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:54)
    at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl.apply(DefaultScriptPluginFactory.java:187)
    at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:39)
    at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:26)
    at org.gradle.configuration.project.ConfigureActionsProjectEvaluator.evaluate(ConfigureActionsProjectEvaluator.java:34)
    at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:55)
    at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:470)
    at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:79)
    at org.gradle.configuration.DefaultBuildConfigurer.configure(DefaultBuildConfigurer.java:31)
    at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:128)
    at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:105)
    at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:85)
    at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:81)
    at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.java:33)
    at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.java:24)
    at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:39)
    at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:29)
    at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:50)
    at org.gradle.internal.Actions$RunnableActionAdapter.execute(Actions.java:171)
    at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:237)
    at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:210)
    at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:35)
    at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:24)
    at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:206)
    at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:169)
    at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33)
    at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22)
    at org.gradle.launcher.Main.doAction(Main.java:33)
    at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45)
    at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBootstrap.java:54)
    at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.java:35)
    at org.gradle.launcher.GradleMain.main(GradleMain.java:23)
Caused by: java.lang.NoClassDefFoundError: org/gradle/api/tasks/compile/Compile
    at org.springframework.boot.gradle.SpringBootPlugin.useUtf8Encoding(SpringBootPlugin.groovy:59)
    at org.springframework.boot.gradle.SpringBootPlugin.this$2$useUtf8Encoding(SpringBootPlugin.groovy)
    at org.springframework.boot.gradle.SpringBootPlugin$this$2$useUtf8Encoding.callCurrent(Unknown Source)
    at org.springframework.boot.gradle.SpringBootPlugin.apply(SpringBootPlugin.groovy:55)
    at org.springframework.boot.gradle.SpringBootPlugin.apply(SpringBootPlugin.groovy)
    at org.gradle.api.internal.plugins.DefaultPluginContainer.providePlugin(DefaultPluginContainer.java:110)
    at org.gradle.api.internal.plugins.DefaultPluginContainer.addPluginInternal(DefaultPluginContainer.java:69)
    at org.gradle.api.internal.plugins.DefaultPluginContainer.apply(DefaultPluginContainer.java:35)
    at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.applyPlugin(DefaultObjectConfigurationAction.java:117)
    at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.access$200(DefaultObjectConfigurationAction.java:36)
    at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction$3.run(DefaultObjectConfigurationAction.java:85)
    at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.execute(DefaultObjectConfigurationAction.java:130)
    at org.gradle.api.internal.project.AbstractPluginAware.apply(AbstractPluginAware.java:41)
    at org.gradle.api.Project$apply$0.call(Unknown Source)
    at org.gradle.api.internal.project.ProjectScript.apply(ProjectScript.groovy:34)
    at org.gradle.api.Script$apply$0.callCurrent(Unknown Source)
    at build_23dcqk82m5a2344os7qh8f3l3m.run(/Users/jrong/Sites/boot/build.gradle:17)
    at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:52)
    ... 31 more
Caused by: java.lang.ClassNotFoundException: org.gradle.api.tasks.compile.Compile
    ... 49 more