Added .gitignore
Updated odatagen project settings to Xcode 5
Relinked libxml2 in odatagen
Updated MSODataLib project settings to Xcode 5
Updated MSODataLib max and available data service versions to 3.0
Replaced hardcoded data service versions with constants in MSODataLib
sources
Added build phase to copy xxl files due to fix an issue in code I do not
dare to replace