Fix .gitmodules
Add OSX Build in .gitignore

Sorry guys but since I'd like to use Xcode, I need a separate folder
for the build (cmake will create a lot of garbage in it)
Fix issues in CMakeLists.txt

In the root's CMakeLists I've changed the compiler-version check (I'm
using g++ 4.8.2 locally)

In the test's one, I had to insert the LOG4CXX include's directory..
normally it should find it automatically thanks to the other module,
but well.. it wasn't the case.
Refactor + Correct compiling warnings

1) Make the ProcessDecider a little bit smarter (still a couple of
things need to be done in order for it to be completely independent
from the message received)
2) There were some useless checks here and there, instead of
complaining with Michael I've fixed them. (checking if an unsigned int
is less than 0 is not that useful!)
Merge pull request #10 from massix/master

Fix issues in CMakeLists.txt + Refactor + Correct compiling warnings