[DONE] Feature submodule

[gortium]

TODO:

• [x] Modify sara_install to reflect change here

Step to merge:

1. Merge branch feature_multipleRepo first.
2. Merge the sara_install branch of the same name.
3. Merge the sara_robot branch of the same name.
4. Merge this branch.
5. Pull change on desktop and robot.
6. Run in every sara_ repo:
   • git submodule init
   • git submodule update
7. Delete every folder in saraws/src/ except those with sara prefix. They are now submodules.
8. Modify dependencies.rosinstall to fetch the develop branch (do the same when merging to master)
9. Build

Fix #49

[gortium]

Pourquoi Travis rebuild si ya pas eux de changements?

[gortium]

@gregoirefra Ensuite, si tout c'est bien passé dans multipleRepo, continue avec cette branch pour introduire les submodule. La ca devien un peux plus complexe ;P Follow the step :)