Allow env var to control port

Update default twitter cb url

Updated guide language

Span up

Strip recipient email from to

Map usernames to lower-case

Error codes in HTTP response

More cautious parsing of twitter handles from Direct addresses

typo in assignment

conf available to routing

typo

Loading error msg

Basic error handling on load

Re-word instructions

Step 0: fixtures only
Allow env var to control port

Strip recipient email from to

Map usernames to lower-case

Error codes in HTTP response

More cautious parsing of twitter handles from Direct addresses

typo in assignment

conf available to routing

typo

Loading error msg

Basic error handling on load