* added sql index for component_access
* improved policy for expanded code files
* reduced amount of initially expanded code files
* faster DummyEdge creation
* faster DummyNode search by token id
* switched GraphController DummyNodes and DummyEdges to shared_ptr for memory safety
* fixed crash when snippet has no code.
* fixed crash when saving a filenode with special characters in its name
* fixed crash when aborting the parsing
* modified the TaskParseCxx to be able to run multiple times in parallel
* made FileRegister threadsafe and changed a lot of its mechanisms
* added TaskGroupParallel that runs all children in parallel
* added TaskParseWrapper that acts as a decorator to execute some code before and after parsing.
* implemented task setup in project with 4 parsing threads
* removed SimpleTask as it was only used as interface for the LambdaTask