include support for description metadata

doc/configuration.toml

@@ -1,3 +1,5 @@
+# In this file, the value of each configuration option is its default.
+
 [links]
 # The prefix to apply to all internally-generated URLs.  Default is "/".
 prefix = "/"
@@ -11,3 +13,7 @@ directory = ".dragonglass.tmpl"
 default = "default.html"
 # The name of the default stylesheet.
 stylesheet = "dragonglass.css"
+
+[metadata]
+# If true, use page title as default description.
+description-title = false

doc/metadata-values.txt

@@ -5,6 +5,10 @@ aliases
 	List of alternative names that can be used to link to a
 	particular page.
 
+description
+    (Obsidian Publish standard metadata)
+    The description for this page.
+
 publish
     (Obsidian Publish standard metadata)
     If this boolean value is False, the page will not be published.

doc/template-vars.txt

@@ -8,6 +8,9 @@ default_stylesheet
     The filename of the default stylesheet which is generated by dragonglass and added to the
     generated pages.
 
+description
+    The description of this page. May be empty.
+
 dragonglass_version
     The version number of dragonglass.