Add attribute "SAR" to Moive
Fix option name of video profile
Add watermark to encoding options
Add watermark using filter_complex
Add SAR spec
Merge remote-tracking branch 'upstream/master'
Add watermark encoding options spec
Add usage of watermark encoding option
Update README.md
Merge pull request #58 from smoothdvd/master

Add attribute "SAR" to Moive, Fix option name of video profile in README, Add watermark to encoding options