Simplified event binding/handling
Simplified some code
Don't poison the global scope
Simplified some selectors
Micro optimizations
Use `on()` rather than `bind()`
Disable submission button if no change has been made

Fixes evernote#67.
Cleanup: removed oldIE-specific declarations
Ugly workaround to avoid submit button jumpiness
Switch input's `checked` property, not the attribute
Toggle submit button when state changes using command keys

Fixes evernote#71
Cleanup: Provide form's action url from view

Reduces cruft on templates. Templates should be used to display the data,
not for retrieving the context.