Improved call graph resolution
* Added tests to verify "a.foo()"
* Added implementation of "a.foo()" call resolution
* Modified AbstractCodeParser.CreateTypeUse() to return an empty string when the type name is missing
* Modified AbstractCodeParser.CreateMethodCall() to add CallingObjects to method calls
Fixed bug that caused variable declarations to not be added to C++ type definitions.
Merge branch 'topic-data-incrementalupdate' of github.com:abb-iss/SrcML.NET into topic-data-incrementalupdate