https://bugzilla.gnome.org/show_bug.cgi?id=687520
Finish the last change and reenable the shader code.
Add support for GstVideoMeta and GstVideoFrame. Remove some redundant fields that are also in GstVideoInfo Disable the shader code, it looks broken. Fixes https://bugzilla.gnome.org/show_bug.cgi?id=681719
As suggested on IRC rename to AudioVisualizer. We use custom suffix on the type to avoid clashing with other copies for the time being.