Clean up in-source documentation
Reomve variables *FILENAME as these are not necessary
Fix unintended removal in commit cc4a54c559
Untabify
Remove unused files

* config.opts is a remnant of the AutoTools build system
* module_revision is out of date (we use releases from now on)
Update README with cmake build instructions
Fix typo
Merge pull request #16 from laods/cleanup

Clean up