refactoring of roundFunctions - added public method for returning DateTime object
upgrade to newer slf4j
fix parents poms mess in application
refactoring of Aggregator interface
AbstractAggregator for easy use of aggregators
Not tested trend aggregator
simple foreach method (a little bit shorter after code folding than foreach loop)
multi aggregator for calling multiple aggregators at once
configure method for aggregator
refactoring of AbstractAggregator
RangeAggregator
clean up and refactoring essential util package:
 * move EventGenerator from integration-tests here
   and more reusable abstraction of generator
 * fluent Event operations
Basic aggregation:
  * trend aggregation
  * range aggregation
fixed storage-application version
Simple refactoring:
- HFactory2 splited into separate classes
- extremum event serializer can tell regarding column family
- LimitedList doesn'h have to limited and behaves like standard TreeSet
Extremum dao refactoring. Each Extremum Case must be in sperate class
draft of extremum MinimumAggregator
fixes after yesterday refactoring
jetty as deamon so it will close while testing
ExtremumTest -> MinimumTest
configuration for integration tests
activeMQ and cassandra autostart before storage integration tests
fixed column selection for StandardEventSerializers
fixed test
test of deleteEvents
week save and get for rangeDao test