Get rid of YarpAceCheck

Now ACE is handled almost as any other dependency
Enable testing only when required
Export new motor interfaces from DLLs
[bindings] tweak find_package(yarp) and paths during integrated build [thanks @elen4]
[testing] make sure test configuration can be recovered from dashboard
[yarphear] use std::deque rather than ACE class, fixes #82 [thanks @mdtux89]
Allow chaining of 'robots' directories, like 'context' ones [thanks @pattacini]
[bindings] simplifying post-build step for LUA
[yarpros] add type name to yarp::sig::Vector
[yarpros] add data directions and type information to controlboard ports
[yarpros] add wire-twiddling information to type server
[yarpros] keep all node-related syntaxes working until we pick one/none
[yarpros] one side of http connection may be virtualized
[yarpros] make slot for type-on-wire as distinct from type-in-code
don't expect replies to messages that we failed to send
ignore some other common bindings build directories
[yarpros] upgrade yarp/ros integration (wip)
[yarpros] do a very basic test of yarp/ros configuration
[yarpros] cleanup stray comments and type glitch
[yarpros] bring back yarp->ros image transmission