GSoC Refactor god objects weekly report

[V]

This week I refactored IDocumentState and IDocumentStatistics.
Another thing to write about: During this GSoC I learned vim. At the 
start I  knew what vim was and had used it minimally before but I mostly 
chose nano or edited with graphical programs. So I learned about 
keyboard shortcuts, copy and pasting, registers, selecting text, syntax 
highlighting, using vim in tabbed mode, ... and I havent stopped 
learning yet.

Valentin