add validation into app.vendor_project('xxx', :xcode, ...) because xcodebuild command fails if xcode project directory is not writable
add validation into app.vendor_project('xxx', :xcode, ...) because xcodebuild command fails if xcode project directory is not writable

incbee/RubyMotion,incbee/RubyMotion,katsuyoshi/RubyMotion,HipByte/RubyMotion,katsuyoshi/RubyMotion,beni55/RubyMotion,HipByte/RubyMotion,jjaffeux/RubyMotion,beni55/RubyMotion,katsuyoshi/RubyMotion,hboon/RubyMotion,katsuyoshi/RubyMotion,hboon/RubyMotion,incbee/RubyMotion,jjaffeux/RubyMotion,beni55/RubyMotion,beni55/RubyMotion,hboon/RubyMotion,jjaffeux/RubyMotion,incbee/RubyMotion,HipByte/RubyMotion,jjaffeux/RubyMotion