Revert PR #200

This restores the original structure/behavior of the
`salt_formulas` Pillar key.

pillar.example

@@ -135,6 +135,9 @@ salt_formulas:
     # environment, if an option is missing in a given environment, the
     # value from "default" is used instead.
     default:
+      # URL where the formulas git repositories are downloaded from
+      # it will be suffixed with <formula-name>.git
+      baseurl: https://github.com/saltstack-formulas
       # Directory where Git repositories are downloaded
       basedir: /srv/formulas
       # Update the git repository to the latest version (False by default)
@@ -157,11 +160,9 @@ salt_formulas:
   # List of formulas to enable in each environment
   list:
     base:
-      https://github.com/saltstack-formulas:
-        - salt-formula
-        - postfix-formula
+      - salt-formula
+      - postfix-formula
     dev:
-      https://github.com/saltstack-formulas:
-        - salt-formula
-        - postfix-formula
-        - openssh-formula
+      - salt-formula
+      - postfix-formula
+      - openssh-formula