Complete rework of log processing : use scalding to generate reports

Creation of gatling-log module
First day of integration : probably does not work at all yet but whatever we push it !
Working DataReader with general stats, number of requests, active sessions and kind of response time distribution
Cleaning preprocessor
Mini refactor
RequestsPerSec and TransactionsPerSec with a modification of DataReader abstract class
Creation of classes and a parser to parse and put the tuple generating by scalding. (Only GeneralStats is done yet)
Creation of classes and a parser to parse and put the tuple generating by scalding.
Use Buffer[A] and a parse function for the memory tap
Defines constants to use classes for each type of result
Define buffer with a class by result type
Just a little modification
Define buffer with a class by result type
Refactoring + Adding new val in the ResultBufferFinderAndParser.
Little correction
Little correction
Use GeneralStatsBuffer
Modify StatsResults to use the new buffers
Refactoring + Using new Buffers for the outputs in Stats.
Define buffer with a class by result type
Little correction
Use the new buffers for the session processor
Use the new session processor and add some long to int conversion
Remove import of an inexistant class
Work for some stats
Blemale refactoring
Externalize buckets functions
Add some parameters to the instanciation of the DataReader
Use buckets for response time histogram
Refactoring FileDataReader initialization + Refactoring eventPerSec functions to fix a bug when there is no event for a given bucket + Debug Stats
Response time and latency per sec plots
Use a mother class for most of the class record + add a generic filter method
Implementation of the scatter plot.
Scatter plot done
Adding support of mutil log files in input.
Use Long for some size and delete unused methods from DataReader
Use seq instead of list
Use a helper to get value from a map with cast
replace tuple for function declaration with case in order to have named parameters
Refactoring : Scala convention for constant -> Java convention + some other refactoring.
Debug due to merge.
Refactoring : removing magic number
Group response time and latency by execution start date instead of response start
Refactoring : replacing Int by Long for all the count.
Over-Refactoring
Use Long instead of Int for more stats
Removing FileDataReader from charts module and other non used files.
Reformatting spaces to tabs
Reformatting
Do not filter negative response time use 0 instead
Rename source, tap and entry
Use official jgrapht
Reformat with Eclipse

add to possibility to extract the content of a specific attribute while using CssExtractor

LagartoDOMBuilder.parse is not thread-safe at all

Avoid having to use Some() in the DSL

Use Long instead of Int

Upgrade Netty 3.5.5..Final, close #657

Remove useless StringBuilders

Always log HTTP failures, close #658

Typo in FileDataWriter

Add converter from RequestStatus to boolean

Get execution time, latency and response time from RequestRecord

Add support for optional writers

Correct responseTime formula, delete executionTime

Delete RequestStatusValue and implicit conversion

Introduce Terminator in charge of terminating the run, close #661

Need to rework ConsoleSummary tests

Add missing config values