Improved Xcode4/5 support, improved loader, install routine, code cleanup.

Moved loading routies to more reliable XCFixin model. Eliminated
unneccesary and non-functional install scripts with simple compiler
directives and removed unneccesary version.plist .  Tidied codebase.
Small edit to Readme regarding  ~/.MacOSX/environment cariable used in
info.plist.  Changed schemes.. one for xcode4, one for xcode5 vs.
debug/release.