closes #211, closes #213
issue #214, preparing for addition of post.parse hook by renaming markdownToHTML to just "toHTML", and making it asynchronous.
refactored postTools.toHTML to fire post.parse hook, and removed auto-markdowning

closed #214
closed #212
closes #206
Merge branch 'master' of https://github.com/designcreateplay/NodeBB
closes #216
closes #217
closed #218
fixed derpiness I introduced last commit
derp
Merge branch 'master' of https://github.com/designcreateplay/NodeBB
adding localhost as default for email server
fixing broken category
fixing teasers, that I broke in the last commit
closes #210
Merge branch 'master' of https://github.com/designcreateplay/NodeBB
changed max age to milliseconds
matching connect-redis session with cookie ttl
closed #180, closed #223