Add link following and refactor the profiler.
Implement scrolling and better zooming
Update rust-layers for GL_LINEAR zooming
Provide an interface to the engine for the script task
handle relative url's when clicking
Refactor flow tree construction and actually use display property.
Implement horizontal scrolling and pinch-to-zoom
Send status messages to the compositor
Spin the event loop every 50 ms to allow Rust channels to be processed.

This is the nail in the coffin for GLUT; we need to fix this.
Resolve relative URLs that begin with '//'
check for A in addition to a in elelement tags
Update rust-glut
merge onto incoming
merge onto incoming