Adding eclipse files to gitignore
Adding to system preferences to be able to :
- disable native implementation
- be able to "install" the native implementation somewhere on the HDD
- change version number to next SNAPSHOT : 1.3.4-SNAPSHOT
- set surfire XX:MaxHeapSize to 256M
- moved signature plugin to a specific active profile (to be able to
  disable it)
- created a "privateClassif" profile to be able to set a specific
  qualifier to the jar to be able to differenciate it from the official
  one