update fabric plugin documentation
apply review fixes
Merge pull request #135 from cloudify-cosmo/fabric-plugin-docs

update fabric plugin documentation
update plugin authoring guide
small fixes
remove type/relationship implementation from terminology page
fix cfy ref docs
Merge pull request #140 from cloudify-cosmo/update-plugin-authoring

update plugin authoring guide
small fixes to the script plugin docs
update chef plugin docs
fix windows agent install docs
update readthedocs references
added-docker-plugin
update puppet docs
Update node template type in docker docs example
added agents overview and agent packager documentation
some clarifications
added docker bootstrap instructions. still got some stuff to fix
some updated
some fixes + installing a specific release