Add tests for minified require build
Remove "shell" code type from README
Use lowercase in examples (close #62)
Use a smaller DB size to avoid a prompt in Safari
Fix parsing error in IE8 with delete

IE8 doesn't really like when you use store.delete(key) and throws an "SyntaxError: Unexpected identifier".
It works fine with store['delete'](key).
Add comment re: .delete
Add version info to promise.js
Add info about dist/ and src/ commits to CONTRIBUTING
Add info on getting SlimerJS and PhantomJS on Win/Linux
Fix crash in sandboxed Chrome apps (close #68)

Uses try/catch instead of `if (window.chrome)`.
Upgrade Firefox to 27 to test #70
Merge pull request #71 from mozilla/firefox-27-state

Upgrade Firefox to 27 to test #70