Video Preview

should install ffmpeg for the method to work successfully
fixes broken link in readme
Merge pull request #597 from bartj3/fix/readme

fixes broken link in readme
Merge pull request #592 from manufuentescr/patch-4

Video Preview
Added check for ImageMagic and FFMPEG installation

Still uses generic pre-rendered thumbnail as fallback if one of the dependencies is missing
Also inb4 syntax or code errors. I uses the browser editor for this commit :')
Merge branch 'master' of https://github.com/venomous0x/WhatsAPI

Conflicts:
	src/php/func.php