Inline Boolean Expressions (#1817)

The following conditions must be satisfied to inline:

1. has type Utils.BoolType
2. is bound to a DefNode with name starting with '_'
3. is bound to a DefNode with a source locator that
   points at the same file and line number. If it is a MultiInfo source
   locator, the set of file and line number pairs must be the same. Source
   locators may point to different column numbers.
4. InlineBooleanExpressionsMax has not been exceeded
5. is not a Mux

Also updates the Verilog emitter to break up lines greater than 120 characters