document deps
On invalid depslog header, restart build instead of showing an error.

Also add tests for invalid headers.
fix windows build after depslog
add ifdef around console_
Merge pull request #534 from nico/invalid_log

On invalid depslog header, restart build instead of showing an error.
fix test
Merge pull request #535 from sgraham/fix-windows-depslog

fix windows build after depslog