announce: bokeh 0.3rc1


I would like to let everyone know that Bokeh 0.3rc1 has been tagged. I expect that source dist tarballs and conda packages will be available tomorrow afternoon. If anyone would like to try out this release candidate please clone the GitHub repository and check out "0.3rc1". Any feedback (especially related to omissions or inaccuracies in the docs, readme, quickstart, etc.) are very much appreciated.