Removed Jinja-esque placeholders from example Pillar; added instructions

The structure of this example file was quite confusing. Most of these
values are not required and should be denoted as such. Jinja notiation
to denote re-used Pillar values was also a bad and confusing choice.

Closes #8

pillar.example

 
   # ``apache.vhosts`` formula additional configuration:
   sites:
-    # Default values below are used unless disabled by setting to 'False'.
-    example.com: # must be unique; used as an ID declaration in Salt; also passed to the template context as {{ id }}
+    example.net:
+      template_file: salt://apache/vhosts/minimal.tmpl
+
+    example.com: # must be unique; used as an ID declaration in Salt.
       template_file: salt://apache/vhosts/standard.tmpl
+
+      ####################### DEFAULT VALUES BELOW ############################
+      # NOTE: the values below are simply default settings that *can* be
+      # overridden and are not required in order to use this formula to create
+      # vhost entries.
+      #
+      # Do not copy the values below into your Pillar unless you intend to
+      # modify these vaules.
+      ####################### DEFAULT VALUES BELOW ############################
       template_engine: jinja
 
       interface: '*'
       port: '80'
 
-      ServerName: {{ id }} # uses the unique ID above unless specified
-      ServerAlias: www.{{ id }}
+      ServerName: example.com # uses the unique ID above unless specified
+      ServerAlias: www.example.com
 
-      ServerAdmin: webmaster@{{ id }}
+      ServerAdmin: webmaster@example.com
 
       LogLevel: warn
-      ErrorLog: {{ logdir }}/{{ id }}-error.log # E.g.: /var/log/apache2/example.com-error.log
-      CustomLog: {{ logdir }}/{{ id }}-access.log # E.g.: /var/log/apache2/example.com-access.log
+      ErrorLog: /path/to/logs/example.com-error.log # E.g.: /var/log/apache2/example.com-error.log
+      CustomLog: /path/to/logs/example.com-access.log # E.g.: /var/log/apache2/example.com-access.log
 
-      DocumentRoot: {{ wwwdir }}/{{ id }} # E.g., /var/www/example.com
+      DocumentRoot: /path/to/www/dir/example.com # E.g., /var/www/example.com
 
       Directory:
-        default: # "default" is a special case; Adds ``{{ wwwdir }}/{{ id }}`` e.g.: /var/www/example.com
+        # "default" is a special case; Adds ``/path/to/www/dir/example.com``
+        # E.g.: /var/www/example.com
+        default:
           Options: -Indexes FollowSymLinks
           Order: allow,deny
           Allow: from all
         Additional config as a
         multi-line string here
 
-    example.net:
-      template_file: salt://apache/vhosts/minimal.tmpl
-
   # ``apache.debian_full`` formula additional configuration:
   register-site:
     # any name as an array index, and you can duplicate this section
-    {{UNQIUE}}:
+    UNIQUE_VALUE_HERE:
       name: 'my name'
       path: 'salt://path/to/sites-available/conf/file'
       state: 'enabled'