This updates the build scripts to use a bash shebang for consistency
with other scripts as well as better portability. If using a non-alpine
BUILDIMAGE (e.g. debian) the build scripts are not valid sh syntax.
In writing better RELEASING docs, I realized the build was repeating
steps. In fixing that I fixed some make deps, but realized I *still*
can't make the build ideal.
At least it is written down now...
Faster builds and versions from tags. Also use alpine as a base image. We
need alpine for other architectures...
Also change the --wait flag to take a float for sub-second waits.
Sam Dowell
Tim Hockin
Michael Grosser
Thomas Jackson