renamed engagement_checker
Merge branch 'hydro-devel' of https://github.com/strands-project/strands_hri into hydro-devel

Conflicts:
	strands_interaction_behaviours/idle/launch/idle.launch
new speak_webserver tool
renamed
now remembers previous setting
modified style a bit and added more lines
Merge pull request #50 from marc-hanheide/hydro-devel

created new webservice to make the robot speak