flow: use Module and new Record APIs
genlib/record/connect: add match_by_position
flow: match record fields by position
uio: remove Trampoline (Python 3.3 provides generator delegation instead)
ioo: move to genlib
fhdl/visit: add TransformModule
ioo+pytholite: use new Module API
fhdl/verilog/_printinit: initialize undriven Special inputs (bug reported by Florent Kermarrec)
fhdl: support len() on all values
bus/csr/SRAM: fix Module conversion errors
Change license to 2-clause BSD