Merge pull request #10 from jordandukart/1.x

Added logic to grab thumbnail from the middle of the input video  as opp...
Merge pull request #11 from jordandukart/1.x

Change to only use ffmpeg to create video derivatives.
image/tif isn't right
i was too rash
Merge pull request #12 from willtp87/1.x

image/tif isn't right
Merge pull request #16 from nhart/1.x

1.x update for newer version of ffmpeg
Remove quoting method that was leading to double-quoted labels
Merge pull request #18 from unb-libraries/1.x

Remove quoting method that was leading to double-quoted labels
Merge branch '1.x' of https://github.com/discoverygarden/IslandoraPYUtils into 1.x