Minor clean up
Upgrade commons-math3 3.2
Rename Session.safeGet into getV
Fix build
Upgrade Netty 3.6.5.Final, close #1073
Fix gatling.conf
Use extractors instead of ugly if else if
Better extractors
Use UOE instead of IAE where it makes sense
Fix group charts
Fix stats.tsv
Minor clean up
Writers are synchronized
Use Streams in Graphite too
Let the user handle ClassCastException if he uses get instead of getV
Add Session.get(key, default)
Leverage SessionHook and IterationHandler to properly use Validation
Minor clean up
Use string interpolation for serializing records
DataWriter is merely a router, it should be in charge of building messages