Use checked() and add ability to default checkbox on

To set the checkbox default, set the 'std' item to true or 1
Fixed logic once more, added filter for checkbox validation

No really, I've got it working this time. Now you can set a default
"checked" status, and you can accurately test whether it's on or off
after that.
Revert "Fixed logic once more, added filter for checkbox validation"

This reverts commit 1abc9b0d3bd34a021297ca2bd409983b13f48cc8.
Enable an oEmbed type with ajax display
Enable an oEmbed type with ajax display
update contributors list, bump version string, and better error handling when a user hasn't entered a proper oEmbed url
bump version numbers
remove debug info, add to author data
bump version string, and better error handling when a user hasn't entered a proper oEmbed url
increase max-width for embeds
Merge pull request #255 from jaredatch/ajax-oembed

Ajax oembed, version 0.9.1 closes #254
Change URI
Use native WordPress function
Fix CMB_META_BOX_URL bug on Windows.

Replace the define constant of CMB_META_BOX_URL to works with Windows/Linux/Mac OSX.
Merge pull request #258 from luizhrqas/patch-1

Fix CMB_META_BOX_URL bug on Windows.
Fix merge conflict