This is a fairly small change from the previous snapshot, but fixes
some bugs that have been reported. Also, it gets past working with
some of the newer Xilinx unisim models.
Release Notes for Icarus Verilog Snapshot 20060215
* Part select of memory words should now work according to
Verilog-2001. This also led to some cleanup of the handling of types
internally, as well as some infrastructure for general arrays.
* Minor fix to parsing of (* *) attributes.
* Fix rounding of reals to integers.
* Clean up some of the vvp engine related to memories. Remove some