replace multi_json with yajl
Merge pull request #23 from lanrion/replace-multi_json-with-yajl-ruby-21

replace multi_json with yajl #21
Merge branch 'master' into upload-media-from-remote

Conflicts:
	lib/weixin_authorize.rb
	weixin_authorize.gemspec
can upload any kind picture
updated media_spec
add medias test file
added mini_magick