Move oauth/index.php to match DirectoryIndex

This setting in .htaccess would let oauth/ being listed if the site has
Option +Indexes.
twitteroauth: upstream 7c47dd7

With $decode_json modified to FALSE.
oauth: refactor HTTP error handling out
oauth: let type=2 use 'oob' as callback
twip: add another set of oauth tokens for GET requests
Merge pull request #50 from jimmyxu/oob

Add another set of OAuth tokens for GET requests
Merge pull request #48 from jimmyxu/master

Move oauth/index.php to match DirectoryIndex
fix position of indices
Merge pull request #46 from wjchen/master
twitteroauth: fix headers not echoed

Follows up 31f89d1.
fix: restore getOAuthRequest method for image uploading in o_mode
remove twitter Api-v1 code. Changes: 1.only json type 2.no search api 3.no DELETE http method.
Merge