Generic querying front-end.
* pattern match
* interval queries
Merge branch 'master' of github.com:ever-been/everBeen
Fix stack trace logging for BEEN services.

fixes #172
Merge branch 'master' of github.com:ever-been/everBeen

Conflicts:
	persistence/src/main/java/cz/cuni/mff/d3s/been/persistence/NativeQuery.java
Implement interval and regex queries. Remove `NativeQuery`.

relates to #164
Merge branch 'master' of github.com:ever-been/everBeen
* re-implement service log fetch using interval query
* fix non-serializable bug for `AttributeFilter`

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