Added Funktion to handle filenames from user
Integrated a split to seperate grid and poly grids in seperate outputfiles
Compress handle_user_filename and create_xdmf_xml
Add subfunction to create_xdmf_xml
Add description fixed time series bug
Correct mistakes and remove loops
Add documentation for time_series_grids
Add error check for user filename and rename time_series_grids
Remove identation mistakes
Remove more identation mistakes
Merge pull request #113 from c-schumann-zih/topic-Splash2xdmfWithSplitedGrids

Topic splash2xdmf with splited grids