v2.0.0

• complete rewrite using the new sublime-syntax system
• fixed countless highlighting bugs
• removed W3C validator for performance (will return as separate package)
• remove backtracking regexes for performance
• much, much faster
• updated for latest changes to the specs
• CSS variables
• HTML5 custom element selectors
• added exhaustive completions
• increased specificity of completions (less noisy)