e.g. 7.44.F(3) creates a fixed point literal with 2 bit binary mantissa

Fix FixedPoint literal firrtl emit
Start test for FixedPoint

Does not compile.

This has been deprecated for a long time now (and really shouldn't
have existed to begin with).

Deprecating toBits removes the capability to cast an arbitrary
type to UInt.  While it's still possible to do so using asBits.asUInt,
this creates boilerplate.  (asBits is almost never useful itself.)

For Chisel nodes defined in Module class-level values of type Option or
Iterable, we can still use reflection to assign names based on the name
of the value. This works for arbitrary nesting of Option and Iterable so
long as the innermost type is HasId. Note that this excludes Maps which
always have an innermost type of Tuple2[_,_].

Clean up Scala code, and use +& to generate a lot less FIRRTL

For reasonable circuit delay, need to divide & conquer.

Closes #229

h/t @sdtwigg @davidbiancolin

renamechisel3 - "chisel" -> "chisel3"

Rather than using a global counter, memoize the last returned value for
colliding names to generate smaller sequence numbers.

Rename package Chisel to chisel, add Chisel package for compatibility

Move chisel/... to chisel/core/..., make chisel/compatibility package/folder, move more things into utils

Move more publishing definitions into commonSettings.

This should have been part of PR #194.

Add a hack to build.sbt to allow local publishing
We're merging this despite the failing tests (Jenkins ghprb isn't communicating with GitHub following security and authentication updates). We'd prefer to package all the sbt subprojects in a single jar, but current attempts to do so fail. See #208.