Add README

Author: Stephanie Sharp

README.md

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+#MaterialTextField
+
+A [Material Design](https://www.google.com/design/spec/components/text-fields.html#text-fields-single-line-text-field) inspired UITextField with animated placeholder label and error message.
+
+![MaterialTextField screenshot](https://raw.github.com/stephsharp/MaterialTextField/master/materialtextfield.png)
+
+##Features
+
+- Floating placeholder label
+  - Animates on focus or on text input
+  - Supports attributed placeholder text with custom fonts
+  - Can be turned off to use the text field with the default iOS placeholder
+- Text field underline
+  - Line height expands when editing
+  - Customize colour for default, editing and error states
+- Error message
+  - Animated error message appears below the text field
+  - Long error messages wrap onto multiple lines 
+- IBDesignable view
+  - Adjust the appearance of your text field in Interface Builder with inspectable properties
+
+##Setup
+
+###CocoaPods
+
+To install via CocoaPods, add to your podfile:
+
+    pod 'MaterialTextField', '~> 0.1'
+
+###Carthage
+
+TBC
+
+##Acknowledgements
+
+I found the following libraries to be useful references when creating MaterialTextField:
+
+- [MaterialKit](https://github.com/nghialv/MaterialKit)
+- [JVFloatLabeledTextField](https://github.com/jverdi/JVFloatLabeledTextField)
+
+
+##License
+
+The MIT License (MIT)
+
+Copyright (c) 2015 Stephanie Sharp