0.5.0 is released

0.5.0 is a major feature release of the plugin. DSL is overhauled. Most of the code has been re-written. Please refer to README.md for usage.

Major changes:

• Supports Android projects (resolves #11). Interacts well with Android build elements, e.g., variants, buildTypes and flavors.
• Moved protoc builtins and plugins configuration from sourceSets to tasks in order to work in Android projects.
• All Protobuf code-gen options are moved into the top-level protobuf block (resolves #14)
• Generated files of different builtins and plugins are in different sub-directories (resolves #13)

Minor changes:

• extractedProtosDir option is removed
• Released artifacts are now compatible with Java 6 and up