Merge pull request #47 from bdolor/dev

resolving inconsistent naming convention for chapter files
Revert "resolving inconsistent naming convention for chapter files"

This reverts commit 993f6c55d7e258f8f18349b62a80a57f020fee3c.
Alternate fix for inconsistent naming of chapter files that doesn't break numberless chapters.
And… trying again.
epub support for WP image rendering service for latex equations