1. editing the CMakeLists for adding the following libraries: boost-system sdformat protobuf. 2. Removed Mutex and replaced with yarp mutex. 3. removed unused ace include. 4. In CMakeLists added explicit include and link to libraries
Update .travis.yml to include boost system compile time dependecy to test both Debug and Release compilation
Fixed missing yarp/os/Mutex.h header
Substituted yarp::os::Mutex with yarp::os::Semaphore for compatibility with yarp 2.3.22
Merge pull request #45 from robotology/osx-compile-test

Modification for compiling without issues on OS X