Prevent eating arguments that match files
Required nodemon accepts `env` to pass to spawned process

See https://github.com/ChrisWren/grunt-nodemon/pull/29 for example/request
Pass non-nodemon args *in order* to exec. Fixes #263
Allows nodemon to error if non-existent script is passed
If mac, only use `find` on --watch directories
cli takes priority over execMap
allow dump to run without any extra args
execMap uses script ext to lookup. Fixes #265

+ tests
Tests for all the help examples
Merge pull request #267 from remy/feature/env-and-cli-fixes

Feature/env and cli fixes