Add stub env as a development dependency
A lame attempt to detect Xcode beta versions
Core.default_template handles Xcode 6 beta versions
New default_template examples for active xcode
Respect DEVELOPER_DIR in Resources current_xcode_version
Add method to safely manipulate DEVELOPER_DIR
Preserve DEVELOPER_DIR when asking for alt xcode details
Examples for Core.default_tracetemplate against alt Xcodes
Merge pull request #77 from calabash/feature/Xcode-6.2-beta-find-automation-template

Xcode 6.2 beta - find the default trace template