Introducing alid

[rikki cattermole]

Looks pretty well tested, nice!

But in other less nice things, I take it you did not test with GDC? GDC 
does not support cli args with the same names as dmd. One of these is -mv.

The file structure of subPackage/alid/subPackage will not require it and 
you will not have the cross import issues, where if you depend on 
errornogc you can also import (and then get linker errors) for 
circularblocks.