Add I-D template.
Write more README text.
Finish README and add the project README template.
Add template for an IETF YANG module.
Merge remote-tracking branch 'skeleton/master'

Conflicts:
	README.md
Add boilerplate text with instructions for RFC Ed.
Use entity for apostrophe.
Use current date in module revision.
Merge remote-tracking branch 'skeleton/master'
Merge branch 'master' of github.com:igp-yang/isis-yang