Minor nitpicking on javascript and stylesheet include tags

## javascript_include_tag.sublime-snippet

* Renaming  javascript_include_tag.sublime-snippet to  HTML_Rails-javascript_include_tag-(jit).sublime-snippet
* Adding cache option

## stylesheet_link_tag.sublime-snippet

* Renaming stylesheet_link_tag.sublime-snippet to HTML_Rails-stylesheet_link_tag-(slt).sublime-snippet
* Adding cache option
* Changing tab trigger landing position to be within quotes.