update mongo-collection-instances to 0.2.6

Make Sortable compatible xhtml

comparisons of node names (via the nodeName property) are done in upper case. However, nodeName is lower case in xhtml. Let's do everything in upper case.

Add spm support

Fixed angular directive for complex ng-repeat expressions

Sort event does not always fire

In the dev branch the `sort` event is not always correctly called on the receiving list. This IS working in the latest released branch. The fix is trivial and included in this PR.

The case is illustrated in this JsBin: http://jsbin.com/muxojulevo/3/edit. It occurs whenever an item is picked up from a list and dropped in a nested container.

Improve Meteor demo

Published 1.0 to Atmosphre + update example to it

Meteor integration

Two-way integration with Meteor collections