More extensive comment on the CassowaryBuilder
Formatting and some comments
Add formatters API to CassowarySurface
Don't call setProperties if none of the properties changed
Correct the check on whether a formatted variable changed
In variable functions, make 'this' a reference to the Surface
Remove unused stanza referencing a 'parentExpression'
Give demo surface a 'move' cursor because why not
Add touch to the CassowarySurface demo
Make accuracy of accurate description more accurate
Merge branch 'master' into gh-pages