Add roseus_bt package

[Affonso-Gui]

Adding the roseus_bt package to run Behavior Trees in roseus.

Probably not perfect but have included a lot of examples so hoping that it should be fairly easy to follow!

[708yamaguchi]

When I run

roseus t04_subscriber-action-server.l
rosrun roseus_bt_tutorials t04_subscriber

The latter command outputs an error.

terminate called after throwing an instance of 'BT::RuntimeError'
  what():  Error at line 13: -> Node not recognized: RetryUntilSuccesful
Aborted (core dumped)

[Affonso-Gui]

@708yamaguchi That name was a typo that was fixed on BehaviorTree/BehaviorTree.CPP@f54f6d8 (in the latest version)

I've just corrected it

[708yamaguchi]

Thank you so much.
It works well!

[knorth55]

.travis is changed in this PR.
2c772ca (#681)

do not change .travis.

[knorth55]

this branch is old that we cannot build groot eus10 correctly.
please update this branch @Affonso-Gui
i.e. cancelAction() API in ws_action_client.h has changed.

[Affonso-Gui]

@knorth55 Thanks, I will take a look next week.

[Affonso-Gui]

@knorth55
I have updated the branch and confirmed that it compiles with groot roseus_bt and behaviortree_cpp_v3 v3.8.

However, I plan on prioritizing the eus10 branch and PR (#718) from now on, which I will also be reviewing soon.