Add a README
Add a dedicated cache directory

Cache files need special permissions on the server side. This also
removes the author and changelog cache files, they don't need to be
tracked.
Update .htaccess
Escape an ampersand
.gitignore cache files
Factor out cache file generation
Merge pull request #6 from parasti/cache

Factor out cache file generation
Import Parsedown 1.0.0-1-gb384839
Add a release notes page/parser
Tweak CSS for release notes
Merge pull request #7 from parasti/release-notes

Release notes
Move source documents to a subdirectory
Update documents to current versions
Fix off-center menu
Remove alias names from credits

Rewrite authors.txt parser in the process to make said change possible.
Update download page
Update home page for 1.6.0
Add a link to @rlk's Oculus video
Update documents
Update download sizes