Janitor sketch. Inequality selector.

relates to #164
relates to #119
Merge. Implement basic query integration testing into ExampleTask.

relates to #164

Conflicts:
	persistence/src/main/java/cz/cuni/mff/d3s/been/persistence/SkeletalAttributeFilter.java
Merge branch 'master' of github.com:ever-been/everBeen
Repository janitor.

fixes #119