Merge pull request #265 from mono/master

Upate documentation files. First Pass.
Added stream loading of PlistDocument instances.
Fix for label width adjustments for multi-line labels.
Merge pull request #266 from totallyevil/STREAM_LOADING_PLIST

Added stream loading of PlistDocument instances.
Merge pull request #267 from totallyevil/LABEL_WIDTH_FIX

Fix for label width adjustments for multi-line labels.