Merge pull request #7 from francois-keith/master

Correct ros installation and use of ros variables (close #6).
[travis] Call script properly
[travis] Set ROS version explicitly (see ticket #8)
Run apt-get update after adding ROS repositories
Fix ROS bootstrap and installation on Hydro
Install apt dependencies automatically
Install software dependencies automatically
Fix typo in package name
[travis] Make Travis less verbose to produce less than 4Mb of log
Make Git quiet
Place Git options at the correct location
[travis] Make make quieter
[travis] Make make quieter
[travis] Only display log if build fails
[travis] Fix build script call
Colorize, require explicit ROS_VERSION (close #8)
Do not make OpenHRP a requirement
[travis] Enhance output management
Fix use of non-existing function
[install-sot] urdf_parser_py needed for hrp2_14 management with groovy