Deep monitoring

[gagle]

Make --dir to monitor all the markdown files inside the tree structure, not only the first level.

[codelahoma]

If anyone does this, please make it a separate option, such as [-r , --recurse].

There are a lot of markdown files in the tree of a typical node application.

For instance, find . -name '*.md' in the root of gulp-starter finds 1745 files!.

[djKianoosh]

fyi.. i added a 'depth' option to recurse subdirs if you're interested... here's my fork: https://github.com/djKianoosh/markdown-live