remove plain iphone from simulator device types and set the default to 4 inch retina
check for xcode dev tools on mac
check for xcode on mac and gcc
remove deprecated preinstall checker for nixen
add change notice on preinstaller behavior
Merge branch 'master' of github.com:AppGyver/steroids into topic/check-xcode
Merge pull request #39 from AppGyver/topic/check-xcode

Topic/check xcode