fixed build issues (problems with framework paths etc.)

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
added SQLite wrapper; result goes to PrivateFrameworks (temporarily - Xcode has problems linking it otherwise

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
added some .xcworkspace objects

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>