Limit latex equations to page width.
Fixed latex template to support multicol w/ adjustbox.
add page-up and page-down functionality to the autocomplete dropdown
Add 'on_demand' option to interact() so that long-running functions can be started only when explicitly requested
Add initial implementation of 2-handle range sliders for integers.
Add float implementation of range widget
Add an extended range abbreviation including a step value
Disable run button until the function finishes
Fix format problem when showing an error
Add some tests for the 4-5 int/float form in interact()
Add tests for the on_demand option
Adjust range style so that the vertical range marker is visible
Compiled changes to minified CSS
Remove 4-5 tuple forms from interact()
Fix validate logic if min/max are changed
Remove tests for 4-5 tuples, add tests for validate logic
update hmac signature comparison

see https://docs.python.org/2/library/hmac.html#hmac.compare_digest
support Python older than 2.7.7
minor cleanup
warn users running older versions of Python