Updating send and grunt-contrib-watch dependencies

`npm test` still passes all 37 tests.
`nsp shrinkwrap` still gives the following warnings:
```sh
$ nsp audit-shrinkwrap
Name  Installed  Patched  Vulnerable Dependency
qs      0.6.6     >= 1.x  closure-util > get-down > request
qs      0.5.6     >= 1.x  closure-util > grunt-contrib-watch > tiny-lr-fork
```

Fixes #36
Updating to get-down@0.5.0
Merge pull request #37 from pdehaan/patch-1

Updating send and grunt-contrib-watch dependencies.