Merge pull request #11 from ricsp/master

Publish current joint velocity instead of commanded one in manipulator
Update Instruction installation
Update Instructions installation
Merge branch 'indigo-devel'
install indigo in travis
don't use travis in indigo
Merge pull request #16 from ricsp/master

merged hydro changes in master, then added indigo changes on top so that master is like indigo
Update Readme
Update Readme
Update Instruction installation
Fix Readme
Fix Readme
Improvment documentation
Improvment documentation
Improved instructions for Installation
Improved instructions for Installation
don't use travis in indigo
Renamed files and forlders in quadrotor_tk_handler to make it compile
Merge pull request #19 from ricsp/hydro-devel

Minor changes affecting compiling and continuous integration
use simulation time in manipulator to check time since last received command