Strip whitespace from site settings
Merge pull request #2239 from riking/setting-strip-b

Strip whitespace from site settings
BUGFIX: add default value to top_topics' scores
update annotations
BUGFIX: make sure site settings are refreshed after a restore
BUGFIX: N+1 query when listing users in admin section
Change comma-delim site settings to pipe-delim
Add UI for list site settings