sharat87/ti — pull request #7 by abesto (2014-10-07 14:15:28+00:00)
Title: Add support for interrupts

For example (from the test):

```
$ ti o task
Start working on task.
$ ti i interrupt1
Interrupting task with interrupt: interrupt1. You are now 1 deep in interrupts.
$ ti i interrupt2
Interrupting interrupt: interrupt1 with interrupt: interrupt2. You are now 2 deep in interrupts.
$ ti f
interrupt: interrupt2 is done, you're back to working on interrupt: interrupt1.
$ ti f
interrupt: interrupt1 is done, you're back to working on task.
$ ti f
So you stopped working on task.
```

Also supports a time argument, same as `on`.