[worldStateManager]: remove redundant step() function, add ARE port, implement is_free symbol, clean up
Merge pull request #9 from gsaponaro/master

remove redundant step() function, add ARE port, implement is_free symbol
[worldStateManager]: implementation of playback mode and addition of corresponding scripts, thanks @vicentepedro
CMake build: check for OpenCV, remove ICUB dependency
update dependencies and installation instructions
convert database files to UNIX format
Merge remote-tracking branch 'upstream/master'