Refactored cloning

Did a bit of refactoring when it came to cloning fields with  jQuery
widgets.  Clicking the clone button now triggers a `clone` custom event.
If the field has a custom event handler for `clone`, it will be called.
This limits callbacks to just newly cloned elements instead of for every
element on the page like the old way
Trimming with cloning code
Merge pull request #258 from funkedgeek/master

Refactored cloning
Fix missing localized scripts for some languages #259
Color field now supports WordPress 3.5 color picker

For WP 3.5+ installs, built color picker (currently Iris) will be used.
Versions below will default to `farbtastic`
Fixed saving issue with autosaved meta boxes

Removed autosave check from `save_post` function, as it caused meta
boxes with `autosave` set to `true` to only save by autosave and not by
a regular update.  A new `autosave` data field is now added to the
`rwmb-meta-box` div, to differentiate between autosave and non autosave
meta boxes
std used for default select option
Adjusted demo file for new changes
Merge pull request #260 from funkedgeek/master

Autosave bug fix, updated color field, select standardizing
New oembed field
Merge pull request #261 from funkedgeek/master

New oembed field