Update indexes
* Switches ACE from no-conflict mode to regular one (be sure to rerun
* install_deps.sh!)
* Adds support for "Tools:Fix", a generic infrastructure to run
* arbitrary commands that can "fix" code or text (e.g. fix a spelling
* mistake, offer thesaurus based word suggestions, rename a variable
* etc.). Fix is bound to `Command-Enter`/`Ctrl-Enter`
* Adds a fixer for the spell checker (furthering progress on #67)
* No longer analyzes all open files on editor open, but does so on
* demand.