fixes #131 - BEEN API exceptions and handling these exceptions fron WI
related to #141 - pages not handled correctly when connecting to cluster without SR
Merge remote-tracking branch 'origin/master'

Conflicts:
	been-api/src/main/java/cz/cuni/mff/d3s/been/api/BeenApi.java
	been-api/src/main/java/cz/cuni/mff/d3s/been/api/BeenApiImpl.java
Merger BeenApiImpl