Add pymake.
Add dependency checking for gadgets.
Add get_all_sources to gvars and vkits. TODO: Still needs testbench and
rtl sources.
Add dependency checking to vericom.
Change "Build" to "Vlog".
Mode changes.
Merge branch 'vlog'
Make flush a regularly-scheduled cleanup gadget, overriddeable only.
Add a builder gadget. Still not fully functional, though.
Remove fixed values of SO files from project. Use abspath instead.
Add all files from flists to sources.