Asammdf

Removes extra (unneeded) folders from the install package

Fixes
* documentation fixes
* many fixes

Changes
* backwards incompaltible API clean-up (some arguments have been renamed for consistency)
* refactoring of invalidation bits handling
* allow to instantiate MDF from file-like objects
* add _use_display_names_ keyword only argument to MDF classes. For MDF4, if False, it can speed up the file parsing considerably.
* MDF _scramble_ static method: scramble text blocks and keep original file structure (useful for privacy concerns when sending mdf files for debug purpose)

Changes
* mdf v3 code refactoring
* many documentation updates
* gui: improve advanced search results

Fixes
* lib: add logging NullHandler to avoid warning when no logging handler was set for 'asammdf'
* fix for issue 67
* fix for issue 68

Changes
* lib: add 'sync' argument to merge and concatenate methods
* gui: use ui without generated py files
* GUI can run with PyQt4 as well now
* gui: change line style on the current plot
* gui: make sure the cursor remains visible when moved using the left and right keys


Fixes
* fix setup.py to properly include files needed for GUI
* lib: fix MDF3 error when the file header had no comment

Fixes
* fix typo in GUI for range

Changes
* gui:
* line style option
* hex, bin adn physical display mode for integer channels
* cursor, range, statistics
* save and load channel statistics
* see docs for complete functionality (http://asammdf.readthedocs.io/en/master/gui.html)
* update documentation for new demo example and GUI tool


Fixes
* lib: use logging with the logger name 'asammdf' (issue 63)
* lib: fix MDF3 error when chanining operations (cut.convert.resample)
* lib: fix cut when start is higher than the last timestamp
* fix for issue 66