Add command line flags

This adds the ability to override specific `liftoffrc` options from the
command line when running `liftoff`.

Available flags are:

    --[no-]cocoapods                 Enable/Disable Cocoapods
    --[no-]git                       Enable/Disable git
    -t, --indentation N              Set indentation level
    -n, --name [PROJECT_NAME]        Set project name
    -c, --company [COMPANY]          Set project company
    -a, --author [AUTHOR]            Set project author
    -p, --prefix [PREFIX]            Set project prefix
    -i, --identifier [IDENTIFIER]    Set project company ID (com.example)

Added ability to override all boolean & string liftoffrc config options with CLI arguments

Fixed string cli arguments

added indentation_level cli option

- renamed @liftoffrc to @options in Liftoff::CLI
- removed/renamed some CLI options
- moved liftoffrc/cli_options merging from LaunchPad to ConfigurationParser

dot on newline for multiline chained calls

cli: `project_name`->`name`, `indentation_level`->`indentation`

dot on newline for multiline chained calls

- removed separation comments in CLI
- renamed instances of "cli_options" and "cli_config" to just "options"

defaults/liftoffrc

@@ -4,6 +4,7 @@
 # company:
 # author:
 # prefix:
+# company_identifier:
 ############################################################################
 
 configure_git: true

lib/liftoff/cli.rb

@@ -2,11 +2,12 @@ module Liftoff
   class CLI
     def initialize(argv)
       @argv = argv
+      @options = {}
     end
 
     def run
       parse_command_line_options
-      LaunchPad.new.liftoff
+      LaunchPad.new.liftoff @options
     end
 
     private
@@ -17,7 +18,7 @@ def parse_command_line_options
 
     def global_options
       OptionParser.new do |opts|
-        opts.banner = 'usage: liftoff [-v | --version] [-h | --help]'
+        opts.banner = 'usage: liftoff [-v | --version] [-h | --help] [config options]'
 
         opts.on('-v', '--version', 'Display the version and exit') do
           puts "Version: #{Liftoff::VERSION}"
@@ -28,6 +29,38 @@ def global_options
           puts opts
           exit
         end
+
+        opts.on('--[no-]cocoapods', 'Enable/Disable Cocoapods') do |use_cocoapods|
+          @options[:use_cocoapods] = use_cocoapods
+        end
+
+        opts.on('--[no-]git', 'Enable/Disable git') do |configure_git|
+          @options[:configure_git] = configure_git
+        end
+
+        opts.on('-t', '--indentation N', 'Set indentation level') do |indentation_level|
+          @options[:indentation_level] = indentation_level
+        end
+
+        opts.on('-n', '--name [PROJECT_NAME]', 'Set project name') do |name|
+          @options[:project_name] = name
+        end
+
+        opts.on('-c', '--company [COMPANY]', 'Set project company') do |company|
+          @options[:company] = company
+        end
+
+        opts.on('-a', '--author [AUTHOR]', 'Set project author') do |author|
+          @options[:author] = author
+        end
+
+        opts.on('-p', '--prefix [PREFIX]', 'Set project prefix') do |prefix|
+          @options[:prefix] = prefix
+        end
+
+        opts.on('-i', '--identifier [IDENTIFIER]', 'Set project company ID (com.example)') do |identifier|
+          @options[:company_identifier] = identifier
+        end
       end
     end
   end

lib/liftoff/configuration_parser.rb

@@ -1,16 +1,21 @@
 module Liftoff
   class ConfigurationParser
 
+    def initialize(options)
+      @options = options
+    end
+
     def project_configuration
       @configuration ||= evaluated_configuration
     end
 
     private
 
     def evaluated_configuration
-      default_configuration.
-        merge(user_configuration).
-        merge(local_configuration)
+      default_configuration
+        .merge(user_configuration)
+        .merge(local_configuration)
+        .merge(@options)
     end
 
     def default_configuration

lib/liftoff/launchpad.rb

@@ -1,11 +1,8 @@
 module Liftoff
   class LaunchPad
-    def initialize
-      liftoffrc = ConfigurationParser.new.project_configuration
+    def liftoff(options)
+      liftoffrc = ConfigurationParser.new(options).project_configuration
       @config = ProjectConfiguration.new(liftoffrc)
-    end
-
-    def liftoff
       if project_exists?
         perform_project_actions
       else