Update main.markdown

Fixed punctuation and language.
Redirect /chat to scrollback (issue #19)
Merge pull request #18 from notthetup/patch-1

Update membership page
Merge pull request #20 from fmap/master

Redirect /chat to scrollback (issue #19)
https redirect for chat (#19)
The signature references /chat, not /chat/. These are distinct.
Merge pull request #21 from fmap/master

The signature references /chat, not /chat/. These are distinct.
added local postal service information