added the `items` property to the `options` object accessible inside …

…sortable event handler functions (usable when `multiSelectable` init option is active)

added extra init option: `sortOptions`

now the drag&drop can be canceled by pressing the ESC key

sortable fix with the latest aciSortable (prevented full control over…

… the drop target validity check)

Merge branch 'master' of github.com:dragosu/jquery-aciTree

* 'master' of github.com:dragosu/jquery-aciTree:
  .

fixed the bug where the tree node changed level on a lower level and …

…the DOM was not updated correctly

small change to the options.sortValid - sortable extension - for the text message in the tooltip when in drag

focus fix - moved to the first children of the LI to prevent treeview…

… scroll

performance improvements using the DOM API

fixed checkbox/radio-button multiple check/uncheck event trigger

.remove method fix for when no sibling nodes exists

selectable/focus bugfix

persist update/fix for multiple node/loading

fix for the persist extension, node creation performance improvements