It mainly allow to run command in directory containing space.
(Hello, `C:\Program Files\...`)
It would also allow to work on directory containning spaces
(`C:\Users\John Doe`) but xapian configure (at least) expressly doesn't
support it :/
- Run the command without shell=True
- The command must be a list instead of a string.
- All options must also be a list (or an iterable).
When running command without `shell=True`, python's subproccess will look
for variable `"PATH"` and `b"PATH"` and will complain if both are set.
So the defaultdict should not return something for `b"PATH"`.
We also escape space ` ` in the environment variables to not break
everything with directory containing space.
Make kiwix-build installable using pip.
Module is now called `kiwixbuild` because `kiwix-build` is not a valid
python identifier.
Also split toolchains in separated directory.
Matthieu Gautier