Fix PropLookup task not properly handling dynamic dependencies.
task-debug-info now also accepts one task ID.
Don't require the task identifier to be an integer.
Temporary fix for hash code collisions: print the term to a string and take the hash code of that.
Use SHA1 digest as task identifier, a lot slower but the chance of collisions is very low.
Slightly improve speed of SHA1 digester.
Remove unused method.
Add a disambiguate task.
Reordered use tasks to allow for disambiguation.
Fix dependencies from transitive imports.
Merge branch 'master-working-2'

Conflicts:
	org.spoofax.meta.runtime.libraries/nbl/collect.str
	org.spoofax.meta.runtime.libraries/nbl/interface.str
	org.spoofax.meta.runtime.libraries/nbl/utils.str