Request to add a Rotation function

[mikhoul]

I use Vidcutter to edit quickly the video I take with my phone before uploading them to social media or send it to my friends and one thing I miss is the ability to rotate the videos because sometime when I use my phone my video are upside down and I have to use another software to rotate them.

So it would be really useful to have this little option integrated.

Regards

[dandv]

Duplicate of #52.