Depend on yarp 2.3.61 because there is a bug in the yarp debian packages

The yarp debian packages are 2.3.62, but the configuration files say they are 2.3.61
Update README.md
Close #112
Use gazebo simulated time for getEncodersTimed instead of yarp::os::Time::now()
Merge pull request #117 from robotology/issue/116

Use gazebo simulated time for getEncodersTimed
added example database
Merge branch 'master' of https://github.com/robotology/gazebo_yarp_plugins
Propagate fix in https://github.com/robotology/gazebo-yarp-plugins/commit/0146d4ddd95766fb3e726d862f2be93c6727d6a8 to getEncodersTimed
Added additional example line for the rpc help
OOps! forgot a semicolon
forgotten semicolon
Update README.md
Fixing bug https://github.com/robotology/gazebo-yarp-plugins/issues/105 by avoiding name clash between YarpScopedName external parameter in ForceTorqueDriver.h and MUDriver.h
travis: something in gazebo3.1 broke --version, disabling for the time being
Merge branch 'master' into development