FEATURE: Allow manual excerpt to be defined past the beginning of the post

There is still a limitation that the span excerpt must begin before the post_excerpt_max_length.
Update Postgres.app instructions

- remove version number on git so we don't have to change it all the time
- update file path for postgresql.conf
- configure host for psql
- make the seed section its own section so its not embedded as a code snipppet
FIX: Add .cooked class to composer preview

This should make any custom styling apply to both the rendered posts and
the composer equally, as long as a .topic-body parent or a #wmd-preview
parent is not specified.
UX: add dot before new topics via css
Merge pull request #2749 from riking/css-composer

FIX: Add .cooked class to composer preview
Merge pull request #2746 from mcwumbly/span-excerpt2

FEATURE: Allow manual excerpt to be defined past the beginning of the po...
Update DEVELOPMENT-OSX-NATIVE.md

- fixed typo with '/temp' to be '/tmp'
- removed capitalization if 'It' on same line since it's not the beginning of the sentence.
FIX: Remove `contents` class
Merge pull request #2748 from oblakeerickson/patch-1

Update Postgres.app instructions
"FIX": Add error reporting to NotifyMailingListSubscribers

Also skip unactivated users, which may actually fix this
FIX: under certain conditions, raw would change an cooked remain
  when editing a post
Merge pull request #2750 from riking/mailing-list-errors

"FIX": Add error reporting to NotifyMailingListSubscribers
tweak new topic styling
FIX: broken search for admins when selecting topics
FIX: regression, go to quoted post missing in quotes

refactors common code as well
factor common code
minor unread circle alignment fix
fixing alignment of unread post dot
Merge pull request #2752 from awesomerobot/master

minor unread circle alignment fix
FIX: highlight in yellow, not blue
FEATURE: highlight in title