Change return type of MetricCalculator to Number
Merge changes from master
Fix metric values representation in webUI
JFG-498 ExceptionPanel.
 cover one specific situation with metrics.
JFG-503
Client retrieves true trend plots : {(sessionId1, value1) ... (sessionIdN,valueN)}
JFG-498
added throws RuntimeException to every RPCcalls methods
JFG-498
String URL field added to TrendsPlace
url shown while Exception comes
css for exception panel
Hibernate - scan packages
Custom validators values shown in summary when one session chosen.
Fix NPE, Jboss exception, Aggregator generic
Merge pull request #287 from kgribov/CalculatorAggregator

JFG-402 Add String, Double, etc custom metric
success rate implemented with custom aggregator (not match to grid/origin) version
Merge pull request #289 from Gorbush/master

Hibernate - scan packages
merged changes from kgribov with AbstractMetricCalculator
- Default metric for dynamic success rate (SR) is implemented
- Every metric can have summary and dynamic data => two switches to enable/disable both (saveSummary and plotData)
- saveSummary and plotData attributes are deleted from validators XML schema
- Add possibility to set custom name and custom aggregators to SR metric
- Pass events are logged as 1 => simplify success rate per interval calculation
Merge pull request #286 from amikryukov/JFG-503

JFG-503
Merge pull request #288 from amikryukov/JFG-498-url

JFG-498 report errors to user
Merge pull request #290 from amikryukov/custom-validators

Custom validators values shown in summary when one session chosen.
- Error with casting to old version of interface in MetricLogProcessor is fixed