Set podspec version to 0.18

Merge pull request #79 from twotoasters/add-missing-pod-example

Update README.md

Merge pull request #76 from twotoasters/nib-backed-view-framework-bundle

Load nib in the class's bundle

Merge pull request #67 from twotoasters/block-enumeration-group-by

Add group block enumeration method

Merge pull request #63 from twotoasters/remove-whitespace-in-subspec-…

…name

Remove whitespace in subspec name

Move misplaced files

Merge pull request #55 from twotoasters/nib-backed-view

Reusuable nib-backed view class

Merge pull request #49 from twotoasters/KVO-fix

Make TWTKeyValueObserver retain targets before messaging them

Version 0.11

Added Updates to NSLayoutConstraint Category on UIView