Remove HTML-centric, unaliased snippets.
Add YAML-tmLanguage to simplify language editing.

Automates the generation of the tmLanguage file.
Uses https://github.com/SublimeText/AAAPackageDev to convert YAML-tmLanaguage to tmLanguage.
Allow line comments to exist without leading whitespace.
Rename the language to Soy.
Add comment preferences. Enables comment toggling.
Show escaped characters in strings, prevent strings from being erroneously greedy.