Update public/css/forum.css

Set a max-width of 100% for images within posts to avoid having users
define a width every time they post a large image.
Don't update last_ip and last_login on *every* pageview

Instead, only do it every 5 minutes, *or* if the IP address
has changed. last_login is not used for anything important--
it's only displayed on the users' profile page.
Fix spoilers not being clickable in quotes

Also made blockquotes blockquotes. Instead of divs.
Increase thread subject, PM subject, and forum title sizes

Thread subject was annoyingly small. It has been increased 50%.
Similary, PM subjects have been increased to the same number.
Forum title has been increased to 36, because that's what it says.

Updated maxlengths as required
Merge pull request #80 from stenzor/patch-1

Update public/css/forum.css
Adds keyboard shortcuts back onto yay
Correct character sequence for qu and fixed a lint issue
Merge pull request #88 from notjosh/master

API stuff, etc, etc!
Merge pull request #86 from EvanFBC/fixes

Don't update last_ip and last_login on *every* pageview
Merge pull request #96 from cham/keyboardshortcuts

Keyboard shortcuts
WelcomeBot now posts a welcome thread for every new user
Merge pull request #91 from cham/welcomethreadsnoradish

WelcomeBot now posts a welcome thread for every new user
Added /auth/me call so apps can check if a session is valid
Logging in/registering//auth/meing gives more information about the current user. Also moved avatar URL generation into a helper.