Make a new README file, with more relevant information, and AsciiDoc.
Delete some old and unnecessary files.

ChangeLog and NEWS were 0-length, INSTALL is the old outdated README
copied, and eternity.sh is an old unneeded script.
Merge pull request #3 from chungy/readme

Update the README and remove a few unnecessary files
Merge pull request #2 from chungy/master

.gitignore cleanups