Don't lazy load available templates

Otherwise it's impossible to differentiate between text files that are the contentFiles and text files that are the description files for images. 

Example:
-01-project
--page.md
--zebra.jpg
--zebra.jpg.md

This would result in zebra.jpg.md being used as the content file. With this change, zebra.jpg.md is not being considered as a content file, since there's no template named "zebra.jpg"