The file causing problems was not logged.

As the file with parsing (or other) problems was not listed properly, this caused problems with debugging the problem. This implementation lists all processed files and shows which file caused the potential problem. This is probably not the most elegant solution, but works better than nothing.
Merge pull request #140 from Arkkimaagi/patch-1

The file causing problems was not logged.
Merge branch 'master' of https://github.com/assemble/assemble
updating link helper references to href helper
running grunt to build examples after updating the helper reference