increasing max allowed edge count
added extraction time to debug info
PrepareCH: disconnect from higher to lower level nodes of contracting in order to reduce number of edges for higher level nodes; therefor we had to introduce second skip edge entry otherwise expanding seems to be a lot harder (+ increases edge mem usage but faster and easier expand phase); removed simple shortcuttests as we don't need it + we would need to upgrade it to new double skip edge
deleted MyList
remove OSMReaderHelperSingleParse
removed PrepareTowerNodesShortcuts
removed level filter from CH dijkstra (faster+not necessary now that we do disconnect)
introduced astar for CH
minor fix in GraphHopper api