Enable using other version of ROS (at least fuerte).
Add gitignore file.
Correct git installation.

Git is not installed a newer version of
git is already installed on the computer.
Also, correct the path for git-1.7.4.1.tar.bz2
Correct installation of doxygen.

Doxygen is not installed if a newer version
already exist on the computer.
Remove calls to LAAS-dependant packages when the user has no laas account.
correct laas_private_uri.
jrl-walkgen depends on the hrp2, and should be compiled after.
Indicate the lindex during the compilation.

If an error occurs during the compilation,
it will be easier for the user to recompile
directly the right package.
Enhance git clone command to handle repositories containing a dot.

Before, when a repo was called 'repo.git',
it was cloned as 'repo'.
This created some issues during the compilation,
since the program tries to compile 'repo.git'.
Introducing romeo.
There are too many packages that still contain Warnings. Disabling Werror.