Remove the ROBOT and SMALLMATRIX variables, now useless.

The ROBOT variable is now deprecated since
all the robots are tested during compilation.

The SMALLMATRIX is useless since this is the
default version is used in jrl-mal.
Test all the versions of openhrp and install the corresponding packages.

Remove option -g, now useles
 The config file has now its own step.
Correct config file generated + avoid sourcing it during compilation.
Simply clarify the list of ros packages that must be installed.
Add a method for the git log.
Merge pull request #20 from francois-keith/master

Simplifications and small improvements of install-sot