[cron] avoid to be spammed by cron mails
[oarexec]: introduce BASH_ENV=~oar/.batch_job_bashrc for batch jobs

Batch jobs with bash shell have some difficulties to source the right bash
scripts when launching.
Now we set BASH_ENV=~oar/.batch_job_bashrc before launching the user bash
process so we can handle which script must be sourced.
By default we source ~/.bashrc.
[api] changelog missing info about apache conf file
[oaradmin] Disabled deprectaed "conf" sub-command
[kameleon] Started recipe for kameleon v2

Backuped old recipes into kameleon1
Work in progress into kameleon2
[kameleon] continued oar-devel recipe
[kameleon] Finished debian appliance. Tests working!
[kameleon] added README
[kameleon] Updated kameleon2 recipe  to take into account the latest changes
[commands] exit immediately on wrong arguments
[oarsh] propagate OAR shell environment variables

The users have access to the same OAR environment variables when connecting on
all the job nodes with oarsh
[kameleon] used Yaml psych syntax
[kameleon] set US and FR locales and updated aliases