Added drawtools support
Merge pull request #3 from pmoden/drawtools

With Drawtools, user can define an area of portals instead of using the
screen as boundaries.

Conflicts:
	IngressMaxFields.user.js
	README.md
Update revision to 0.0.0.4

CHANGES:
* Add drawtools support
Merge branch 'pre-release 0.0.0.4'