Remove trailing white-space.
Convert single-quoted strings to double-quotes.
Wrap one-statement if and for blocks in braces.
Fix mixed spaces and tabs.
Fix lines incorrectly broken before an operator.
Switch to === and !== for safer equality testing.
Remove unused variable definitions.
Factor out duplicate variable definitions.
Wrap for...in loop bodies with hasOwnProperty.
Add timezoneJS to the JSHint allowed globals.

We trust that jquery.flot.time.js checks for timezoneJS's existence
before using it.