refactored index and file handling, moved plenty of stuff
Merge branch 'master' of github.com:ftes/de.uni-potsdam.hpi.ir.searchengine

Conflicts:
	src/main/java/de/hpi/krestel/mySearchEngine/IndexMergerImpl.java
	src/main/java/de/hpi/krestel/mySearchEngine/SearchEngineFAP.java
	src/main/java/de/hpi/krestel/mySearchEngine/parse/ParserImpl.java