Xcode 8.2 does not allow plugins anymore

[mulle-nat]

See: Xcode 8 won't load plug-ins · Issue #475

mulle-clang-add-to-xcode.sh doesn't work anymore for Xcode 8.2.

TODO:

1. Remove obsolete .xcodeproj files from projects
2. Add documentation how to create .xcodeproj files via cmake with mkdir build-xcode.d ; cd build-xcode.d ; cmake -G "Xcode" .. ; open *.xcodeproj
3. Remove obsolete shell script from distribution

[3a4oT]

@mulle-nat based on our slack conversation we also need to modify CMakeLists.txt.

add_library( MulleObjCStandalone SHARED
src/MulleObjCStandalone.m
${HEADERS}
${DEF_FILE}
)

[mulle-nat]

Ideally make it a pull request for the MulleObjC repository. That would be good for your other changes too.

[3a4oT]

mulle-objc/MulleObjC#1