Webgl 1 support

[ramirofages]

Hello, does the depthdemo actually works with webgl 1.0? I see in the code that there are a few if's checking for webgl2 availability and if not, defaults to webgl 1...but I've forced the path to be 1.0 and I'm getting an Invalid internal format when uploading the video texture. I'm using a realsense 415.