Move main file into lib folder for gem prep
Fix spec regressions; Mostly clear DB

There were a ton of spec errors, parser returning the wrong thing. I assumed I just screwed
everything up while refactoring but I guess it was a problem with the db not getting cleared or...
I dunno, when I added a db.clear to the spec helper, all the other problems went away.
Add test db files to gitignore
Reorganize files for gem layout
Change shebang to use env variable
Add gemspec
Add gem files to gitignore
Point spec helper at correct lib files
Remove date field from gemspec
Remove Rakefile (deprecated)

Rakefile is no longer used now that we are making gems.
Bump version to 2.0.3; Update readme/changelog