proof read chapter 4 and did some changes
some more changes
fixed broken figure refs
added small space for high numbers
some typography changes
typos
made several small changes in Scetion 3
requires merging!
Merge branch 'master' of horibe:community-detection
minor change in intro
small changes in intro
figures are now named correctly
Merge branch 'master' of horibe.informatik.rwth-aachen.de:community-detection

Conflicts:
	paper/plots.tex
modified bib file
rewrote parts of chapter of 4
rewrote and added some sentences in Chapters 4 and 5
expand the motivation of our algo. fix some style and grammar.
Merge branch 'master' of horibe.informatik.rwth-aachen.de:community-detection
fix typo: Cfinder -> CFinder
added a comment in the section 3
working on section 4