Renamed packages, added authors and descriptions

Done: 
* removed unsupported packeges
* consistent naming scheme without ipa_ prefix (#28)
* proper descriptions and author lists for all packages (#31)

Open:
* version is still 0.0.0 for all packages
* wiki links are missing (will be adder after #29)
* bugtracker/repository links?
for what is this launch file used? if it is just for testing, that's OK. Otherwise we should remove it.

type="ipa_canopen_chain_node": this name probably changed now. @ipa-mdl: please adjust