Moved DevKit Environment message to Gem Hook
Moved DevKit Environment message to Gem Hook

 * It no longer displays a message when simply using require 'devkit'
 * Fixes bug that causes Gem install to fail when require returns false

zorosteven/rubyinstaller,oneclick/rubyinstaller,Rugbyman21/rubyinstaller,vemmaverve/rubyinstaller,modulexcite/rubyinstaller,suvarnaraju/rubyinstaller,modulexcite/rubyinstaller,auyaauya/rubyinstaller,auyaauya/rubyinstaller,jahanzaibbahadur/rubyinstaller,shirosaki/rubyinstaller,haonaturel/rubyinstaller,dreamauya/rubyinstaller,jahanzaibbahadur/rubyinstaller,shirosaki/rubyinstaller,jahanzaibbahadur/rubyinstaller,jaym/rubyinstaller,dreamauya/rubyinstaller,zorosteven/rubyinstaller,zorosteven/rubyinstaller,oneclick/rubyinstaller,auyaauya/rubyinstaller,oneclick/rubyinstaller,vemmaverve/rubyinstaller,jaym/rubyinstaller,Rugbyman21/rubyinstaller,shirosaki/rubyinstaller,dreamauya/rubyinstaller,leonhooijer/rubyinstaller,suvarnaraju/rubyinstaller,leonhooijer/rubyinstaller,haonaturel/rubyinstaller,Rugbyman21/rubyinstaller,suvarnaraju/rubyinstaller,haonaturel/rubyinstaller,jaym/rubyinstaller,modulexcite/rubyinstaller,leonhooijer/rubyinstaller,vemmaverve/rubyinstaller