Patch to build in OS X 10.9

Tested in OS X 10.9.2 & clang-500.2.79
Not yet 100% in mrpt-hwdrivers
Sample to grab RGBD from an OpenNI2 device into a rawlog file
Merge pull request #20 from mlopezantequera/newsampleoni2

Sample to grab RGBD from an OpenNI2 device into a rawlog file
Merge pull request #19 from yuya-oc/osx-build

Patch to build in OS X 10.9
Fixed logical OR typo.
Fixed C++11 GCC warnings
debian/watch: Update to point to GitHub
Updated the OpenNI2 rawlog grabber so that it stores proper focal lengths.
clang: bunch of warnings and 1 error fixed
Merge remote-tracking branch 'upstream/master' into travis
Testing only mrpt-base for now