Merge pull request #171 from mozilla-services/windows_build

Windows build
Free the pack up to be used again in TcpOutput
Free the pack up to be used again on error in TcpOutput
Merge pull request #186 from tosh-iba/master

Free the pack up to be used again in TcpOutput
Change version # on master branch to reflect that it's still tied to 0.2 releases.
Merge branch 'master' into versions/0.2
Added changelog.
Add release date for 0.2.0rc1.
Initial release instructions doc.
Use the right syntax for an ordered list.
Merge branch 'versions/0.2' into dev
Dev is tracking 0.3, not 0.2.
Merge branch 'dev' of github.com:mozilla-services/heka into dev