previous grants optional

fixes #295
closes #297
fix fiscal letter field

alter table grants_grantapplication modify column fiscal_letter
varchar(255);
minor tweaks

per kylie walkthrough
renamed template docs

still need to verify/update
imports organized
membership.emailed and last_activity allow null

makes more sense for admin. requires db scripts
last_activity on every form post

#311
removed logging
logging for debugging #300