Only use sha1 checksums for names of parametric modules when the verbose form is to long
Fixed hierarchy pass for hierarchies of parametric modules
Fixed handling of positional module parameters
Added "flatten" pass
Fixed README for new show command behavior (svg vs. ps)
Added support for const cell inputs in techmap
Improved/simplified TCL bindings
Added tcl "yosys -import" command
Added support for verilog === operator