Bump release to 0.3.0.

@reset updated this a week or so ago. Officially bump it.
Add changelog information for service LWRP.
Add the binstubs.
Fix tests and lint failures.
Add support for EL7.

This should work out of the box with EL7 since we do not need anything
for EL6. When CentOS is released we can test it against the opscode
bento boxes.
Rename recipes for install of binary/source.
Add rspec/chefspec and linting.
Bump version of the cookbook.
Update the README.
Update the travis configuration.