start versioning management

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
set_version for files

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
update rake tasks git:{up,push}

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
restore full rspec

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>