#107 severity as constraint attribute
#107 cleanup
#107 parameter validation
#107 severity support in sonar extension
Merge branch 'master' into severity-patch

Conflicts:

core/analysis/src/main/java/com/buschmais/jqassistant/core/analysis/impl
/RuleSetWriterImpl.java
#107 severity as constraint attribute
#107 cleanup
#107 parameter validation
#107 severity support in sonar extension
#107 severity - sonar export
Merge branch 'severity-patch'
#103 rename StreamFactory to FileResource
#103 simplify scanner API
#103 unify scanning of container items like directories and archives
#103 unify scanning of container items like directories and archives
#103 fix build error
#103 fix build error
throwing an exception on analyze errors was gone with one of the last commits
#103 improve performance
#103 use lists instead of sets for CONTAINS relations for better write performance