Adding Authoriser mac target
adding CHCrypto class
Open plist file.
set up bindings to plist dictionary.
Authoriser: setting up array controller
Authoriser: enable save document, and keys not editable.
Create ExportCertificate tool, setup as build dependency for CocoaHeads; Copies key from keychain into built app.
Log warning if p12 file is missing
reduce logging from chcrypto
update ignore file for security
Adding app delegate accessor to credentials.
update podfile to use https url
add shared file
Update export certificate tool to fail with error message if key is not in keychain
Merge branch 'authoriser', adding export certificate tool for encrypted storage of meetup api keys.
Merge branch 'master' of https://github.com/mattconnolly/cocoaheads-iOS
added DataModel header for easy import, also grouped model and core data files

Signed-off-by: Darrin Mison <dmison@me.com>
CHCocoaHeadsBrisbaneAPI singleton + XCTest unit test target

Added API singleton
 * one method to parse venue from JSON
 * added xctest target and test for above
 * sample json added to test

Also
* renamed DataModels to CHDataModels

Signed-off-by: Darrin Mison <dmison@me.com>