ZS-86: Dealt with sledding and KS-asm issues

See merge request zipr-be!19

Large ints as constant operands are weird in ks-asm.  Need to use
positive value, in hex, for less than max-signed-int, and negative
hex values for values between max-signed-int and max-unsigned-int.

What's a good magic number for asserting?
Maybe there isn't one across all apps?

code cleanups, and no longer forcing unpinned ibt instructions into the placement queue.  we should put them in on demand if we find they aren't being placed.

Fixed several fields that were being left blank in header, as well as adding code to pad sections so that there is no gap betwee them.  this seems to be required by pe files.