build eDeploy roles for each commit on travis-ci

Use travis-ci.org service to build eDeploy roles for each pull request
and commit.
It will avoid any eDeploy role build failure when making a commit in
scripts.

Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
Merge pull request #42 from enovance/travis-ci

build eDeploy roles for each commit on travis-ci