fix submodule url (#84)

* fix submodule url
* remove travis
10 jobs for devel in 26 minutes and 57 seconds (queued for 8 seconds)
latest
Name Stage Failure
failed
format Test
+ find . -path ./cmake -prune -o -iregex '.*\.\(h\|c\|hh\|cc\|hpp\|cpp\|hxx\|cxx\)$' -exec clang-format-6.0 -i '{}' +
+ true
+ flake8 .
./python/dynamic_graph/sot/torque_control/tests/test_torque_offset_estimator.py:12:1: F401 'pinocchio as se3' imported but unused
./python/dynamic_graph/sot/torque_control/tests/test_torque_offset_estimator.py:14:1: F401 'pinocchio.robot_wrapper.RobotWrapper' imported but unused
./python/dynamic_graph/sot/torque_control/tests/test_current_ctrl.py:126:23: F507 '...' % ... has 2 placeholder(s) but 6 substitution(s)
./scripts/parse-calib-dat-10-04.py:45:5: E741 ambiguous variable name 'l'
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1