Switch to radio buttons for pledge

Some bugs yet, and needs cosmetics
Defaults work.
Tweaks to radio pledge, logging
more clear wording on pledge page about share matching
Switch to radio buttons for pledge

Some bugs yet, and needs cosmetics
Defaults work.
Tweaks to radio pledge, logging
rebasing (attempting for first time) the radio stuff up to newer master
Merge branch 'radio' of github.com:dlthomas/snowdrift into radio

Conflicts:
	Model/Shares.hs
fixed merge errors I missed before
adjusted congrats message for establishment
adjusted eligible message
adjusted message for accepting the honor pledge
inserted honor pledge into template
and linked to honor wiki page
fixed bad thing missing <> part in one line
wording for establish eligibility form
partial fix for look of establish form
fixed Bootstrap issue by using areq' instead of areq
centered stuff in honor acceptance form
removed the reason part of the message for eligibility for now
we can deal with it later as we figure that out, it's in the DB anyway