Update README.md

- `includeSourceURL` is not longer an option. It was replaced with `includeSourceMap`. Updating README to reflect this.
- `separator` default listed in the README differs from the one in the code. Fixing this documentation.
Merge pull request #41 from bsandrow/patch-1

Update README.md
Fix typo.
Merge pull request #42 from eventualbuddha/patch-1

Fix typo.
Fix multi-task links

Was pointing to old wiki - Docs are now on gruntjs.com
Merge pull request #43 from FellowMD/master

Fix multi-task links
minimal change to make it pass jshint
Merge pull request #49 from Blooie/jshint

minimal change to make it pass jshint
add MIT license
Update docs with new source map options.
Use updated //# pragma, fixes #22

See spec at https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit#heading=h.lmz475t4mvbx
and discussion at https://groups.google.com/forum/#!msg/mozilla.dev.js-sourcemap/4uo7Z5nTfUY/_YNQtSxdclkJ
Source map sections track file offset. Fixes #36
Remove extra new line breaking test
Require line matching is greedy for newlines.

This fixes an "off-by-one" bug when the require line is followed by one or more empty lines.
Allow script root to be defined.