[pg_users] quoting rolename

so usernames don't explode
add contribution from @j-martin to the README
Merge pull request #122 from phlipper/quoting-role_name

Quoting role name - #112
Add replication mode to pg_user
add contribution from @helgi to the README
Merge pull request #123 from phlipper/replication-pg_user

Replication pg user
bump version to 0.14.2
replace `pg_database` definition with LWRP
replace `pg_database_extensions` with LWRPs:

* add `postgresql_extension` LWRP
* add `postgresql_language` LWRP
* update `pg_database` recipe
* add spec coverage
* add ChefSpec matchers
replace `pg_user` definition with LWRP
strict about rspec deprecations
update `database` provider, add spec coverage
add `guard-rubocop`
cleanup Guardfile
remove default action
ensure action is a symbol
avoid unnecessary shell execution
rename `recipes/{pg_user -> setup_users}.rb`
rename recipes/{pg_database -> setup_databases}.rb
add `setup_extensions` recipe