Chrome NaCL maifest version

When publishing to Chrome NaCL Unity creates manifest.json file with "version 1" in it.

There seem to be two problems with this:
1. version 0.0.1 would make more sense as Google will only allow higher version to overwrite previous, and traditionally we think about version 1 as final release.
2. do we have an option somewhere to set version number? Android version number is not shared and we have to increase version number by hand in text editor every time the game is uploaded. Or maybe I can not find it