Initial experimentation with nt2ing and strings
Removing compiled intermediates.
nt2int changed and working

nt2int was breaking the string handling, because it was turning A’s
into 0s which equal ‘\0’ which ends C strings. So added a new iseq
array to hold the integer (index) representation of the sequence. This
doubles the memory consumed by a Unique, but this probably is not a
concern.
Merge branch 'scratch' into nt2int_fix

Conflicts:
	align2dom.c
	dada.h.gch
File cleanup
Added C test of changes.
Merge pull request #2 from benjjneb/nt2int_fix

Nt2int fix