added notes to docs that items in TokenList should not contain spaces
PopUpManager: listens for when centered Feathers components resize to keep them centered (was previously only listening for stage resizes (references #638). improved documentation.
fixed docs
TextFieldTextRenderer: checks snapshot dimensions in refreshSnapshot instead of TextField dimensions because they could be out of sync and we need to avoid invalid bitmapdata sizes (closes #714)
Merge branch 'master' of https://github.com/joshtynjala/feathers into wip