Minor improvements:
- Added getSignature to FunctionDeclaration in ASMDeclarationWatcher
- Added simplified constructor to ASMStorage
- Update Engine version in Carma pom

Change-Id: I885a22ba83dd50a790926f9e2f35c366ef02de7a
Signed-off-by: mstegmaier <michael-1.stegmaier@uni-ulm.de>