initial travis file, support for ubuntu trusty and osx builds
initial travis file, support for ubuntu trusty and osx builds

artoolkit/osg,jtorresfabra/osg,jtorresfabra/osg,scrawl/osg,tomasthoresen/osg,artoolkit/osg,jtorresfabra/osg,openscenegraph/osg,marchelbling/osg,jtorresfabra/osg,tomasthoresen/osg,openscenegraph/osg,tomasthoresen/osg,tomasthoresen/osg,openscenegraph/osg,openscenegraph/osg,artoolkit/osg,artoolkit/osg,marchelbling/osg,scrawl/osg,marchelbling/osg,scrawl/osg,scrawl/osg,marchelbling/osg