small bug fixes to new hw_routes logic
GPIO compile fail fix

load_hw_routes did not load the required hardware settings into variables in the workspace,
just into a struct. Logic now runs through the struct and converts the fields into variables
in the workspace. Tested with compiles.
Explicit latency settings for Relational blocks

The default latency for Relational blocks changed between System Generator versions.
Scripts created for older versions of System Generator assume a default latency of
1 but the latest System Generator version has a default latency of 0.
Scripts updated to be explict.
casper_library/mirror_spectrum_init.m - latency=0
casper_library/address_gen_vacc_v3_mask.m - latency=1
casper_library/delay_wideband_prog_init.m - latency=1