Add support for an advanced task scheduler managed by the application.
Merge pull request #136 from DavidCPhillips/allow-scheduler

Add support for an advanced task scheduler managed by the application.
Add the proper dependencies to spf.tasks.
Merge pull request #137 from DavidCPhillips/fix-deps

Add the proper dependencies to spf.tasks.
Require a name for dependency-based script/style loading.

Closes #25.