Removed file path from ReferMethod, path is now replaced by symbolic link to source file in java project

path is composed from package name and class name of source file, where entire method is declared
Implemented methods for initialization of DataProvider and method for obtaining ReferMethod
Refactoring, created new object model for invocated methods
Refactor names
Resolving the invocation count, refactor of ReferMethod, added javadocs
Refactoring
Fixed bug in MethodVisitor used to parsing CompilationUnit