Added new Custom alert view style enum.
Added Custom enum case to switch-statement that sets the image and color passed in, as well as grows the icon image view to be larger inside the circle view.
Added image and color params to the default showTitle method so they could be passed in for the custom alert view type, and are left nil for all others.
Added git icon for demoing the custom alert style.
Exposed the new showCustom method in the header.
Updated the storyboard with a new buttom to demo the custom feature, and added the outlets to handle creating a new custom alert and displaying it.
Made the alert view conform to the UITextFieldDelegate protocol, and set itself as the delegate on the textfields it creates.
Set the return key type to Done for every textfield when you add it because it is the last field.
After adding a new textfield, and if there are other fields present, set the prior field's return key type to Next.
Implement the textFieldShouldReturn: delegate method, and if the field is the last field dismiss the keyboard, otherwise get the next field and make it the first responder - for much faster and more user-friendly form navigation.
Merge pull request #7 from mamaral/easier-form-navigation

Easier form navigation
Added documentation for the new showCustom method.
Updated README with new custom info.
Added screenshot image for custom.
Merge pull request #6 from mamaral/custom-icon

Custom icon and color
Merge branch 'master' into feature/animations