Set opacity on hint input

iOS Safari will set disabled inputs to opacity: 0.4. In order for the
hint to be fully visible, the opacity needs to be set to 1.
Cleanup bloodhound constructor example
Fix accessing array length in loop condition statement.

Also, add back a missing local variable declaration.
Avoid unnecessary requests by checking most recent url before proceeding
Add and integrate with Transport#cancel.
Use node v0.10 for travis.
Remove required attribute from hint. Closes #806.
Fix #clearPrefetchCache regex namespace bug. Closes #771.
Filter out non-typeahead elements for plugin methods. Fixes #815.
Update query on whitespace change. Fixes #879.
Use jQuery v1.7 for development.
Add undocumented option for bypassing request cache. Closes #848.
Enable support for multiple fields
Run components in strict mode. Closes #675.
Coerce set value into string. Fixes #881.
Change hint input from disabled to readonly. Closes #839.
Add warning to doc about prefetch local storage limits.
Allow customize the style of typeahead highlight text using 'tt-highlight' class.
Fix uglify warnings.
Clean up tt-highlight pull request.