Add support for configurable command line options
Move fixture loader to test_helper
Tests for configurable command line options
Updated Readme file
Replace overwriting configuration with stubs
Merge remote-tracking branch 'upstream/master' into feature-commandline-options

Conflicts:
	README.md
	lib/browserify-rails/browserify_processor.rb
	lib/browserify-rails/railtie.rb
Style fixes
Text fixes after #12 merge
Merge pull request #14 from zgryw/feature-commandline-options

Configuration for command line options