started to convert project files to Xcode 6 compatibility

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
started to convert project files to Xcode 6 compatibility

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

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
mySTEP.make: improved installation of results on Mac

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
mySTEP.make: added a list of relevant environment variables; set a useful default for EXECUTABLE_NAME

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
UIKit: fixed Info.plist

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
mySTEP.make: separate Headers, Info.plist and Resources and copy them to the right location in the resulting bundle so that we can for the first time create bundles without the help of Xcode

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
mySTEP.make: tried to correctly handle recursive build

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