Minor change to how clear button is accessed and modified

Added `dismissKeyboardWhenClearingTextField` property to toggle keyba…

…ord when clear-text button is pressed. By defualt, this setting is set to NO, which is a reverse from previous versions

Fixed the ugly vertical offset. Replaced one show/hide animation vari…

…able with two.

Updated podspec

Fixed issue with textFieldShouldClear: not being called

Incorporated some of the bugfixes in pull request ArtSabintsev#5 by @…

…samw-bilue.

Fixed bug introduced in v1.0.11 that began showing float label before…

… text was entered into the text field.

Minor bugfix

Updated PodSpec

Added more logic to float label states from within the layoutSubviews…

… method.