Fixes issue #57 (generated version numbers have wrong format); with the change in this commit the build-bundle-file.sh script constructs a shell that parses the git version numbers a bit differently so that auto-generated version numbers for the Microkernel ISO are more consistent with the version numbers that were used in numbering our Razor Microkernel ISOs previously (versions like "0.9.3.0" instead of "v0.9.3.0").
Merge pull request #58 from tjmcs/tb/fix-default-version-format

(#57) Strips leading `v` from generated version numbers