Fix 'boolian' to 'boolean'.
tiny fix
Merge pull request #3 from pandaman64/boolean

May 'boolian' mean 'boolean'? yes．i fixed it and merged
rename init_keys to register_keys and change the behavior of this function
improve http_request()
implement some function for wrapping twitter API
Merge remote-tracking branch 'origin/master' into with-d
Fix Makefile for library mode.