basic badger palette scripts

badger_gen generated badger palette and adds it to the default palette
badger_block_gen is used by block scripts to draw and redraw blocks
inport, outport used as interfaces to non-badger blocks
add is a basic add block (meant to align with adder block in HDL library)

TODO

* look at finding common functionality during block operation
* more blocks
beginnings of xcos2verilog script