wishbone2lasmi: fix wordbits computation
mibuild: remove useless 'reduce_control_sets auto'
Merge branch 'master' of https://github.com/m-labs/migen
mibuild/altera_quartus: use default gui command line parameters (enable pll constraints propagation) and remove deprecated methods
mibuild: expose add_period_constraint (easier to use for simple designs than vendor specific code)
mibuild/platforms: use add_period_constraint