Change help for --user to reflect that GITHUB_USER is needed regardless of existence of token
Add check for GITHUB_USER regardless of whether access token is saved
ask to save access token if it was disabled; store a note on the github auth
Merge pull request #17 from mreiferson/master_17

saving access tokens and storing notes with auth
Merge pull request #16 from davemarchevsky/fix_github_user_5

GITHUB_USER is always needed, so prompt for it even if access token is set
add support for two factor auth
Merge pull request #18 from mreiferson/2fa_18

two factor auth support
Add -u to git push

Using --set-upstream on the first push makes gits new defaults for push and pull saner.
Merge pull request #19 from jsocol/master

Add -u to git push