Scalastyle cleanup - no functional differences.

Add pointer to Chisel3 compatibility on Chisel2 README.

Verilator suppress warnings

show verilator command on starndard out
Changed --Wno-fatal to -Wno-fatal (double dash became single dash) in accordance with verilator docs
println the verilator command to the standard out, so it can be seen along with the various compiler calls

Print a better message on constant width failures

I'm getting this error and the message is awful.

Remove scalastyle test hook

I'm trying to get RocketChip to work with Chisel3 again, and we need to
run in multiple directories.  This fixes the workaround I made earlier
to actually parse the passed command-line arguments so I can emit FIRRTL
in the correct directory.

I can't get this to work when Chisel 3 is installed as a submodule.

Distribution prep1

Fix init in deq io

README instructions for installing with Scala FIRRTL

Fixed comment punctuation and made it clearer that using an init() method for DeqIO and EnqIO initialization is likely to change.

Make the corresponding test run faster by giving it a Counter.

Emit no width instead of <?> for unknown width UInt and SInt literals…

copied machinery from chisel2 build.sbt
added a few intellij lines to gitignore

Chisel tester support

Cleanup comment for finish method in BasicTester, and finishWrapper in TesterDriver.

clean up the test example

Separate assertion failure message from source locator line