Clean up and document MainActivity

Addresses #24 and #32.
Clean up and document more code.

Addresses #24 and #32.
Merge commit '953c51453d744cd909bd7d8950b61ec2a222de44' into dev
Merge commit '953c51453d744cd909bd7d8950b61ec2a222de44' into dev
Merge commit 'f97e90a225fcd95a8a94c3f0fb465d6e82c9740b' into dev
Merge branch 'dev' of github.com:blinskey/greek-reference into dev
Fix search suggestion ordering

Prior to this change, we were sorting lexicon search suggestions by the
_id column. It turns out that the IDs don't always correspond to alphabetical
order, so we now retrieve and sort by the greekNoSymbols column instead.
Merge branch 'dev' of github.com:blinskey/greek-reference into dev
Clean up and document more code

Closes #24 and closes #32.