Fix LOTS of little nits. Primary changes:

Fix LOTS of little nits.  Primary changes:
 - New intnum module to replace using just unsigned long (for >32 bit values).
   Read values using BitVector instead of strtoul().
 - Brought both floatnum and intnum into expr (still need to integrate calc for
   floatnum).
 - Add traversal function to ternary tree (for use by symrec_foreach).
 - Change floatnum output interface from single/double/extended to byte size.
 - Try to make floatnum/intnum interfaces very similar.  Still needs work.
 - Add/fix *_print functions, including interating ones for sections/bytecodes.
 - Fix handling of $ and $$.  Both now are properly parsed and bytecode'd.
 - Print out all sections and symbol table in main() in preparation for work
   on "cleanup" functionality between parser and optimizer stages (really part
   of the parser stage).

svn path=/trunk/yasm/; revision=270