Add link to PkgPage to page footer

Author: TymonKilich

page/_layout/page_foot.html

@@ -1,5 +1,5 @@
 <div class="page-foot">
   <div class="copyright">
-    &copy; {{ fill authors }}. {{isnotpage /tag/*}}Last modified: {{ fill fd_mtime }}.{{end}} Website built with <a href="https://github.com/tlienart/Franklin.jl">Franklin.jl</a>.
+    &copy; {{ fill authors }}. {{isnotpage /tag/*}}Last modified: {{ fill fd_mtime }}.{{end}} Website built with <a href="https://github.com/tlienart/Franklin.jl">Franklin.jl</a> and <a href="https://github.com/tlienart/PkgPage.jl">PkgPage.jl</a>.
   </div>
 </div>