Fix bug: saving in a CSS inline editor runs compileLess() even though it's
not a LESS file (generating a "compiled" copy of the CSS file with one
letter missing from its filename). Could also have other symptoms in other
cases, e.g. saving in a JS inline editor or saving many files at once via
Save All.
Merge pull request #44 from peterflynn/fix-inline-save

Fix bug: saving in a plain CSS inline editor generates copy of CSS file