Revert "[mms] Add a simple domain checker to the autocompleter that checks for common misspellings."

This reverts commit 2fbb0ea2e4938a0d7723fec458813455b8f4a387.

Conflicts:
	imp/docs/CHANGES
	imp/js/compose-base.js
	imp/package.xml

Move off of browser.  This will instead be a part of a package of
(forthcoming) checks that will be done server-side instead.
optimizations
First attempt at providing visual feedback via autocomplete as to which addresses are invalid

Not sure if I am sold on the architecture of this yet, but it is a
start.