Merge pull request #158 from thgreasi/master

Improvement(README) added notes about dependencies & canceling
Merge pull request #161 from thgreasi/master

test(sortable.spec): add simple $apply test to increase code coverage.
Merge pull request #163 from thgreasi/master

refactor(sortable): change to achieve 100% code coverage on tests
feat(sortable): log error if jquery was not available to angular on load
v0.12.5
Merge pull request #165 from thgreasi/wrong-script-order

feat(sortable): log error if jquery was not available to angular on load