When getting the warning about developmental version numbers, it should be "unstable" instead of "instable":

[ WARNING ] install.xml: Your MOD version (0.0.1) is instable. It should be higher as 1.0.0, but the minor (The middle digit) should not be odd.

I think line numbers for the errors might be useful, as it can often be difficult to find the exact place the error is referring to:

"Element '

Unknown macro: {http}

find': Element content is not allowed, because the content type is a simple type definition."