SuperMassive Typo Fixing

Thanks to my new best friend ReSpeller (http://etherealcode.com/respeller/) I was able to locate and fix  a whole lot of typos.

There are breaking changes here, since several public members had misspellings.  Better get them in while 2.0 is still unstable.

Also, fixed a failing unit test in the expiration bundle, and reorganized the tests under Raven.Tests.Issues so they all use the same convention for their filenames (RavenDB_###.cs)