getTumblelogs can get form_key and channel_id
Introduce sendInfo in getCachedTumblrInfo method
Get multi tumblelogs when Tumblr request fails
post should throw error when it can't find channel_id in blogs
Refine Tumblr Extractor
Throw error in Models.getMultiTumblelogs
Merge pull request #157 from syoichi/pr21-tumblr

Improve Tumblr Model, Extractor, Models.getMultiTumblelogs
Follow the chafe of twitter image uploading
Revise some code for Google+ image uploading
Merge pull request #158 from YungSang/twitter

Twitter の画像アップロードの仕様が変わったので、それに合わせて修正しました。
Add mixi check.

mixiチェックに対応しました。
公開範囲はデフォルト(友人まで)を使用します。
Merge pull request #159 from tanabe/mixi-check

Add mixi check.
Fix some cases with mixi check
Merge pull request #160 from YungSang/mixicheck

Fix some cases with mixi check