--force flag for jsbuild

[whitmo]

"We also envisioned adding a --force option which would make jsbuild
not stop when coming across a js file that doesn't exist on the file
system. We have cases where this would be useful."

-- elem

[elemoine]

As I said on the GeoExt mailing list, I would rather name this flag --ign-missing-deps. I also imagined that we a regexp could be passed (e.g. --ign-missing-deps '^OpenLayers/.*') so that only missing dependency files whose names match the regexp are ignored.

[whitmo]

+1

[bbinet]

+1 :)