Split out the ffmpeg build options into individual steps
Split out the zoneminder build options into individual steps
Removed libtheora, libvorbis, libvpx and libx264 from apt dependencies.

These libs should be installed from source as part of ffmpeg.
Revert "Removed libtheora, libvorbis, libvpx and libx264 from apt dependencies."

This reverts commit fb43fdf04dc668c6745921c68f6bcf7cf3ceeea6.
Added travis build status image to readme [ci skip]
Upgrade and install preqs quietly
Merge branch 'master' into cmake-testing

Conflicts:
	.travis.yml
Merge branch 'master' into cmake-testing

Conflicts:
	.travis.yml