removing background gap on topic closures
Merge pull request #2016 from awesomerobot/master

removing background gap on topic closures
FIX: when shown 403 error page and logging in, it will take you to the same page
Also put the envelope glyph beside topic title edit form for private messages
make sure onebox h3,h4 suppress topmargin
PERF: only rebuild entire top topic table daily
PERF: calculate scores for topics/posts faster

Only look at topics that changed in last day for 15 minuted schedule
Do a full recalc weekly, just in case
BUGFIX: Don't blow up on junk referers
BUGFIX: no need for mock central here
OOPS
small logos should always be proportionate
Merge pull request #2019 from awesomerobot/master

small logos should always be proportionate
fixing width of poster section of topic-list
Merge pull request #2020 from awesomerobot/master

fixing width of user section of topic-list
FEATURE: white_listed_spam_host_domains for domains that are not blocked for spam
BUGFIX: bypass host spam detection for current host
Various cleanups to Ubuntu installation instructions:

* Avoid editing /etc/apt/sources.list add nginx repo, instead create
  /etc/apt/sources.list.d/nginx.list

* Avoid editing /etc/nginx/nginx.conf, instead put server_name_hash_buckets
  setting into discourse.conf

* Proper-case Discourse when it is referring to the product name, so that all
  the lowercase references are to the user created during the installation
Address @Supermathie's concerns in PR1430
Add explicit confirm button text on post abandon
Use symbols instead of strings in order clause

This simply changes the strings in the order clauses in the model. The
reason of the change is because the SQL generated when using symbols
automatically name spaces the column with the table name.

Topic.order(:title).to_sql
=> SELECT "topics".* FROM "topics" ORDER BY "topics"."title" ASC

This also changes the scopes using lamba to use stabby lambas for
consistency with other scopes.
Merge pull request #2023 from infogulch/abandon-confirm-buttons

Post abandon dialog: add explicit confirm button text