Rename to `verifiable_password_authentication`
Merge pull request #127 from octokit/rename-auth-property

Rename property to `verifiable_password_authentication`
Move OCTClient+User into its own file
Move OCTClient+Organizations
Move OCTClient+Keys
Move OCTClient+Events
Move OCTClient+Notifications
Move OCTClient+Repositories
Move OCTClient+Gists
Clean up forward @class declarations
Remove unnecessary imports
Reorganize so OCTClient categories are with their models
Split git data from repository info/content
Move repository listing out of user & org categories
Merge branch 'split-client-categories' into more-git-data

Conflicts:
	OctoKit.xcodeproj/project.pbxproj
	OctoKit/OCTClient.h
	OctoKit/OCTClient.m
	OctoKit/OctoKit.h