Added CocoaConf dates & cities for 2014

CocoaConf will be in Chicago, DC, Austin, San Jose, and Raleigh in 2014
updated venue city for CocoaConf DC

it's actually located in Herndon, Virginia
Merge pull request #2 from jaythrash/patch-1

Added CocoaConf dates & cities for 2014
Corrects úll location

Thanks to @brunokoga.
MacTechConf updated according to their website
Merge pull request #5 from nikita-leonov/master

MacTechConf date updated according to their website
Add NSNorth 2014 dates
Merge pull request #6 from mrh-is/master

Confirm NSNorth 2014 dates
New list, dates updated and, AppsWorld & Mobile March added

New list: The list was separated into 2 lists, 1 for cocoa-only conferences and other for mobile in general or interesting for cocoa devs.
Typo fixed
New conference: ValioCon

A Conference for Designers & Makers
Adds Dutch Mobile
Fixes missing s in Netherlands