[#2]: Add .watsonrc and update README.md

The gem watson-ruby is now ran on the required directories, with
settings in .watsonrc.

README.md has been updated both to show `./bin/issue` and the usage
of watson inline issue manager.
[#2]: Add grunt tasks for some ghi/watson commands

A task that acts as a wrapper around the most commonly used commands
for both ghi and watson, as they both interact with GitHub.