Revert "Provide a way for the Wonder Frameworks to report their version code.  The actual String version is plucked from the "CFBundleShortVersionString" value in a new "Info.plist" file, added for the purpose to the ERExtensions framework (which will be added to any app using Wonder).  In addition to providing the static method ERXProperties.wonderVersion(), the Property "er.extensions.version" is also set to the same value.  Since this method first appears in version "6.0.1" of Wonder, a failure to determine a version is reported as version "6.0.0"."

This reverts commit 0752e25e1a0708fd47b60a0b0e0d4fb45c6df3d0.
Merge branch 'integration' of https://github.com/gavineadie/wonder into integration