Reaffirm string-based generation.

In recent commits, HackMyResume generation logic, much like the pilots
in Top Gun who became too reliant on air-to-air missiles and lost the
true art of dogfighting, has become dependent on file-based generation
as implicit file assumptions have crept in. This commit reaffirms the
file-less, string-based nature of the generation process and, as a side
effect, adjusts the behavior of (binary) PDF generation to match.

src/core/theme.js

@@ -134,7 +134,7 @@ Definition of the Theme class.
         action: 'transform',
         path: absPath,
         major: isMajor,
-        orgPath: PATH.relative(that.folder, absPath),
+        orgPath: PATH.relative(tplFolder, absPath),
         ext: pathInfo.ext.slice(1),
         title: friendlyName( outFmt ),
         pre: outFmt,