updated "option:selected" to work for lack of zepto psuedo selector
updated tests to conform to zepto's api #58
updating tests and code for zepto; included zepto-data.js, a new requirement for selects; #58
update docs to include the new zepto data module requirement
Add options hash as last parameter to binding callbacks #59
Moved event delegation from Backbone handling to .on/.off #57
removed return statement from visible configuration; minor refactoring
fix refactoring mistake where modelAttr/observe might not be defined
updating to 0.6.2