css experiments
#125 add style names
close #125 simpler css inclusion
White background for About page
Merge branch 'master' into css

Conflicts:
	frontend/src/main/java/de/uni_potsdam/hpi/metanome/frontend/Metanome.gwt.xml
	frontend/src/main/java/de/uni_potsdam/hpi/metanome/frontend/client/BasePage.java
Merge pull request #126 from HPI-Information-Systems/css

Css