Allow customization of assembly paths

[legomind]

I am attempting to use this package in a SQL server CLR class (i know :-P), and since the assembly is located in the database, not on disk, the assembly does not have a path in Assembly.location and is not included in the generated assembly, resulting in type not found message.

It would be very helpful to allow specifying a location on disk to use instead of Assembly.location

Are you open to a pull request?