- CORS (Cross-origin resource sharing) support
- Ability to pass custom HTTP headers
(cherry picked from commit 42421f4)
- Tidy up using TABS
Merge pull request #796 from attozk/2.1

CORS and custom headers..
[elFinder.options] add options `handlers`, `customHeaders`
fix merge miss @9b7c592d4c25e0d33e45bb2076cc84bff0781fee
Merge branch '2.1' into 2.1_n
Merge branch '2.x' into 2.1
Merge branch '2.1' into 2.1_n
fix enbug of @aa24cf92d84cd560049ac6ed2390c82575540764
Merge branch '2.x' into 2.1
Merge branch '2.x' into 2.1_n
support ui options customHeaders, xhrFields on xhr upload transporter
[conector] support post request with IE XDomainRequest object
Merge branch '2.1' into 2.1_n
add commandsOptions.netmout.*.done (function object) & use in dropbox
add commandsOptions.netmout.*.done (function object)
Merge branch 'netmount' into dropbox
fix typo commandsOptions.netmount.dropbox
add connector cmd `callback` for netmount authorizing etc...
Merge branch 'netmount' into pixlr_edit

Conflicts:
	css/toolbar.css
	js/elFinder.options.js
	js/i18n/elfinder.en.js
	js/i18n/elfinder.jp.js
	php/elFinder.class.php