TABDEV-1568. Separated Copy Headers into a different target.

This will allow dependent targets to depend on only public headers without building the whole target when they don't need to link to it.
TABDEV-1568. Removed precompile PCH. Fixed weird pbxproj autochange
TABDEV-1568. Re-added product name. This is required.
Merge branch 'TABDEV-1568_jenkins' into develop

Conflicts:
	jive-ios-sdk.xcodeproj/project.pbxproj
		Accepted both sides.
TABDEV-1568. Bad import!!!!

I don't know where this came from, but it is a bad import.