Added support for Gemfile.local

.gitignore

@@ -1,4 +1,6 @@
 .bundle
+Gemfile.local
+Gemfile.local.lock
 # Rubymine project directory
 .idea
 # Sublime Text project directory (not created by ST by default)

lib/msfenv.rb

@@ -2,7 +2,13 @@
 # Use bundler to load dependencies
 #
 
-ENV['BUNDLE_GEMFILE'] ||= ::File.expand_path(::File.join(::File.dirname(__FILE__), "..", "Gemfile"))
+gemfile_base = ::File.expand_path(::File.join(::File.dirname(__FILE__), ".."))
+if File.readable?(::File.join(gemfile_base,"Gemfile.local"))
+  ENV['BUNDLE_GEMFILE'] ||= ::File.join(gemfile_base, "Gemfile.local")
+else
+  ENV['BUNDLE_GEMFILE'] ||= ::File.join(gemfile_base, "Gemfile")
+end
+
 begin
   require 'bundler/setup'
 rescue ::LoadError