asynchronous option added to bus_addsub
small default parameters fix for bus_addsub_init.m
cmult upgrade

asynchronous operation logic change from en port to every block to
en pipeline feeding blocks in progression.

multiplier implemention option allowing choice of hdl, core, embedded
multiplier core. Found to be useful in getting timing with beamformer.
bus_mult upgrade

multiplier implementation parameter option added
window_delay fix

A script was recently used to change all edge, posedge, and negedge
blocks to dynamic edge_detect blocks. window_delay did not have
setting to allow block to modify its internals enabled so that
the internal logic was the default from the library. This broke the
xengine that uses window_delay. Fixed by disabling links of edge_detect
blocks to library and changing setting so that logic can change within
window_delay block. xengine works again.
Merge branch 'master' of github.com:ska-sa/mlib_devel