[ADDED] some tests
[ADDED] validation methods
Merge branch 'master' into develop

Conflicts:
	ObjcModelValidation.xcodeproj/project.pbxproj
[ADDED] validation category for NSNumber
[ADDED] validation method for age number
[ADDED] docs and full validation process
[ADDED] fixtures
[ADDED] validation catgeories
[ADDED] format validation
[ADDED] inclusion
[ADDED] length min, max, in and is validations
[ADDED] presence validation
[ADDED] docs
[ADDED] presence tests for NSObject
[ADDED] NSString presence & tests
[ADDED] absence
[ADDED] validation using categories
[ADDED] import of categories
[ADDED] greaterThan method for NSNumber
[ADDED] tests
[ADDED] validatesWithSelector
[REMOVED] unused classes