* Reflect the fact that FixedPoint is experimental.

* Add import of chisel3.experimental for FixedPoint.

* API change to peek and expect with SInts
Change PeekPokeTester #peek and #expect to return signed BigInt if the signalId they are given is an SInt
Add a signed adder test to confirm this works
This needs to be further built out with fixed point

* make peek work with negative fixed pt numbers

* actually pass options manager to the driver's dynamic variable so the tester has access to it

* make optionsmanager public

Fixed by making long specific poke functions
Added test for behavior reported in Issue #425

* Implicit Int to BigInt fails sometimes when expect is passed an Int
Trying to create simple example has proven intractable
For expect, and poke methods that take BigInts I have created overloaded versions
that take Ints and explicitly convert to BigInt

* Implicit Int to BigInt fails sometimes when expect is passed an Int
remove implicit conversions from int to bigint, that forced negative int into positive value representation

* Per Donggyu, preserve (but rename) his Int => BigInt and Long => BigInt, and make them not implicit

It's just to hard to pick up dut class name without double elaborating, so this should be a decent compromise
Adding hashcode makes separate directories for multiple tests within the same spec file which seems better

* Fixed problem with lack of reporting of failed tests
Add comments on Driver.execute methods
Made Driver.apply use underlying execute methods and provide a couple more useful
options it can set: verbose and testerSeed.  It should be default way of invoking tests
unless need for more backend toolchain option control pushes user towards execute methods
Add step number to expect messages
Fixed number of successful expects not be counted in interpreter based tester
Failed expects print even if verbose is off
Fixed type shadowing on PeekPokeTester peekAt

* Fix typo in comment

One resulted in one of the Driver's execute methods always returning
true (PASS).

One was just a typo on a printed message.

* Use TesterOptions verbose instead of the argument.

* Remove verbose as an argument for testers.

Use the TesterOptions instead.

Disable local signals until ucb-bar/chisel3#331 is resolved.

# Conflicts:
#	src/main/scala/chisel3/iotesters/PeekPokeTester.scala

Peekpokebundles

some style cleanup

and displayBase

Building up a better execute harness
* utilizes composable options from firrtl
* Add IO() wrapping and compile with StrictOptions.

change signal name for verilator 3.886

create temp directory to prevent thread unsaftety

flush vpd every cycle for debugging

signal names start with its top module name, not with 'v'