Create wikipedia.js

First version for Wikipedia search. Still pending: (1) deal with multiple search results (2) return the first paragraph after the righthand table as the description.
wikipedia updated
Update wikipedia.js
Merge pull request #80 from yamafaktory/master

Update Dribbble search provider
Update dribbble.js
Included folder in search results.
#22 updated to working URL, type->project
Update github.js
feature: add Trello support
Merge pull request #81 from bir-ham/master

Included folder in search results.
Update dropbox.js
Merge pull request #83 from radiohead/trello

feature: add Trello support
Update eventbrite.js
Update dropbox.js
Update dropbox.js
Add Diigo Support
Merge pull request #84 from ilbambino/master

Fixes #45. Add Diigo Support
Add Foursquare support
domain added
image added