remove GetRaw
don't use builtin dir as variable name
Merge pull request #288 from ndawe/master

Remove File.GetRaw()
fix #289: Graph and Graph2D must call _post_init
Merge pull request #291 from ndawe/graph

fix #289: Graph and Graph2D must call _post_init
File improvements: setitem and setattr and more unit tests
File: test getattr and getitem object writing in subdirectory
Merge pull request #290 from ndawe/master

File improvements
extend walk to return classnames and directories
regular expression search in combination with a cache
rename ReSearch -> find; make find_fnc, i.e. search or match, optional