增加参数appkey，对应新浪微博，qq空间，腾讯微博，开心网的显示来源参数
开心网参数是aid
Merge pull request #46 from wuxiaoyi/appkey

Support appKey
0.1.8
Popup window support for sharing adding popup attributes
Merge pull request #48 from kishore-mohan/Popup_window_sharing

Popup window support for sharing adding popup attributes
Add `data-via` to allow `{ via: "MyTwitter" }`

The helper is not utilizing the 'via' data attribute for Twitter which
is used within the Javascript.
Merge pull request #50 from InsertCoffee/master

Add `data-via` to allow `{ via: "MyTwitter" }`
avoid the blank content of via
avoid the blank content of via
fix a bug
can specify the title for the special social network
modify the version and readme.md
modify the readme.md
modify the version
modify the changelog.md
fix a bug
Merge pull request #55 from cuterxy/master

Add the special title for the corresponding social network
Merge remote-tracking branch 'upstream/master'

Conflicts:
	lib/social_share_button/helper.rb