Readded dependency
Merge pull request #3 from v-lopez/new-helper-functions

Refactor some code into helper functions
Remove superfluous 'controllers' config entry

It wasn't used for anything since the addition of controller_updater
Make xmlrpc_helper non template functions inline

This is needed to avoid symbol collision at lonk time, as the compiler
will generate weak symbols for inline methods.
It has nothing to do with performance.
Catch ros::InvalidNameException when fetching params

fixes #6
Added getMotions and refactor
Added unit tests for helper functions
Added getMotionDuration
Added comment
Added comment
Added isAlreadyThere, motionExists and refactor
Refactor
Added header installation
Added new methods and refactor
Merge branch 'new-features' of https://github.com/v-lopez/play_motion into new-features