Pull request for Ariacorporate/Latte

I made changes I needed to both latte and lattestats, I am unsure as whether you actually want to pull them in.
* latte now logs WM_CLASS instead of just the window title, split in two entries: the proper application class and the instance, eg: Navigator -> Firefox
* ordering and grouping added to lattestats, time paramaters move to -t (see README.md)
* added config options to allow basic customization of the analyzer output
* added aliases for window_class