Added a test based version of the adder

still failing to assert properly

Fix Counter doc

Refactor tests to use stop() and assert() instead of io.error/io.done

Gate assert, printf, stop by reset
Fix testbenches that never worked
Change simulation prints to display cycle at which test was signaled to end, not when simulator stops
Better documentation for Counter

Add stop() in BasicTester as a replacement for io.done

# Conflicts:
#	src/main/scala/Chisel/testers/TesterDriver.scala

Add support for printf and asserts, add testbench for asserts and printf

clean up some print stuff

retooled gcd example

Add Option support in Bundle

Refactor test code generation, add support for additional .v files

probably not quite right but this commit features a way of getting vectors into the input ports.  Richard says this may violate the api, buy using the switch internals

Create UnitTester framework in parallel with the Spec framework