Renamed package and project group.  Added skeleton task, added extension
to most tasks, which allows properties to be configured.
Updated README with modified extension
Adding uploadArchives task and changed to more permissive license.

Conflicts:
	LICENSE
Merge branch 'master' of https://github.com/jamiefolson/gradle-plugin-r into HEAD

Conflicts:
	src/main/groovy/com/jfolson/gradle/r/RPackagePlugin.groovy
Merge branch 'master' of https://github.com/jamiefolson/gradle-plugin-r into HEAD
Updating README to demonstrate use from maven central.