Add PodCache::Module, provides PodCache::Render

See https://github.com/finanalyst/pod-render
For rendering Pod to another markup, default HTML, using templates. All templates can be over-ridden.
Pod processing has no embedded HTML.
As Pod is processed, data is collected for ToC & index (all headers and X< > items).

Author: finanalyst

META.list

@@ -901,3 +901,4 @@ https://raw.githubusercontent.com/Kaiepi/p6-Net-LibIDN2/master/META6.json
 https://raw.githubusercontent.com/Kaiepi/p6-Digest-BubbleBabble/master/META6.json
 https://raw.githubusercontent.com/Kaiepi/p6-Crypt-CAST5/master/META6.json
 https://raw.githubusercontent.com/taboege/p6-SAT/master/META6.json
+https://raw.githubusercontent.com/finanalyst/pod-render/master/META6.json