Fix indices in long division
Ignore all profiles
Replace dig_div by asm in ndiv and ndiv2
Make sure DIV can't generate exception
Remove unchanged arm/ndiv.c
Fix indices in long division
Move all natural number files to generic/
Fix include paths from subdirs
Fix index in long division
Always allocate at least one digit in init functions
Enable gcc warnings and fix warnings
80 char fixes
Add shallow copy function
Add emacs c-mode variables to header files
Properly enable errors and add full clean target
Add comments to generic and special cpu versions of files
Simplify all natural number functions

Now all of the n functions take only simple arguments (pointers and integers)
instead of structs.  This is how it should have been and will make doing the
asm functions easy/possible.
Switch to using 64 bit full words
Add x86_64/nmul.c
Fix shift errors