Initial check-in.
Initial check-in of firfilter. Added several 80-bit vector commands to tinyasm.

videocoreiv.arch changed to create Javascript disassembler output which is better understandable by me.
Also Firefox did not like the "H(y, 0)" strings and interpreted the comma as separator.

tinyasm:
Added basic support for several 80-bit vector commands. Added some complex branch commands.

firfilter:
Seems to work so far. Configured for 128 taps.
Uses only upper word of every multiplication, so it is basically just an 8 bit filter so far.