Merge pull request #1013 from pdalpra/assertions+reportsonly

Enable assertions checking with "reports only" mode, fix for #995 in master
Minor clean up
Upgrade Scala 2.10.1, close #964
Upgrade AHC 1.7.12, close #1017
Don't build/warmup default HttpProtocolConfig while one is set up, close #1020
Renames CssExtractor to JsonPathExtractor
Merge pull request #1021 from excilys/little-fix

Renames CssExtractor to JsonPathExtractor
Block on System initialization before starting simulation, close #1018, close #1019
Upgrade Akka 2.1.2, close #968
Minor clean up
Let AHC compute Content-length, make byteArrayBody take an Aexpression
Rename sspBody into sspTemplateBody, fileBody into elTemplateBody, make ssp directly expose Session
Make AkkaDefaults extend AskSupport
Make BaseActor an abstract class as it has non abstract methods
Reduce java conversions garbage
Minor clean up
Support basicAuth configuration at HttpProtocolConfig level, close #1022
Add built-in extractor for dumping Session on request failure, close #1023
Minor clean up
Merge pull request #1025 from pdalpra/cleanup

Minor clean up