Remove the optional parameter of loader. `options` defaults to an empty set of options now.
Add pending() to the interface of deferred. Also throw an error if a deferred object been resolved twice.
Add a checker option to the loader. See documentaiton.
Don’t create an interval if the checker is already true.
Add lock and unlock to the interface, for custom locking of the bootstrap.
Fix a bug with non-sequencial loading. We need to create a new scope for the variables we pass to the success and error functions.
Set a timeout for loading a script and don’t overlock the script on insertion. We already lock it everywhere, insertScript can be unsecure.
Version 0.5.0, with API changes.