Changelog updates for 0.3.0.
Changelog updates for 0.3.0.

jnunemaker/nunes,ChrisLundquist/nunes,ChrisLundquist/nunes,ChrisLundquist/nunes,jnunemaker/nunes,jnunemaker/nunes,jnunemaker/nunes,ChrisLundquist/nunes