Watch files

[egoist]

## watch

Run task `build` and watch `src/*.js`

Or

## watch

Run task `build` before this and watch `src/*.js`

A new command for running task and rerun it when watched files are changed.

`before this` will be be optional since that will be a default.

[flxwu]

@egoist I'd like to try my best on this :) Or did you already start?

[flxwu]

Expressions like "Run task build before this in parallel and watch ..." should be possible as well right

[egoist]

yep they can be combined, let's wait for #23 to land first

[flxwu]

👍 This feature would be really useful for myself

[flxwu]

okay, @egoist I have a first working version. Should I still wait for #23?

[flxwu]

And further, how should we determine when to stop the watcher?

[zephraph]

I updated the docs for #23 so that should be ready to merge.

[intermundos]

Does this feature work yet?

I try to run watch task, but get an error:

No task called "*.js" was found. Stop.

## js
JS task with console.log('hola maid!')

console.log('11')

## watch
Watch test task
Run task `js` before this watch `*.js`

[flxwu]

No @intermundos as @egoist still has to review&merge #33 :)

[intermundos]

@flxwu Thanks for the info.