Merged the 0.2b1 and 0.2b2 changelog entries together. There were no changes for 0.2rc1 that represent new functionality since 0.1, and were instead fixes/modifications to new features already listed in the changelog.  Ultimately globbing it all together is more useful to any user who would read over it. This commit comes with it the admonition I've already made elsewhere (see #695) that this needs to be handled better in the future.