Log Message:
- Add LICENSE
- Following tweak on Makefile:
 PATH differs between clang and gcc, add trick by looking for path-by-path
 to be adapted to environments. Proposed by dholland@ thanks.
 Confirmed on following combinations so far.
   NetBSD/amd64 6.1	gcc-4.5.3
   NetBSD/amd64 6.99.21 	clang version 3.2
   NetBSD/i386  5.2  	gcc-4.1.3
   NetBSD/macppc 6.1 	gcc-4.5.3
   DragonFly/i386 3.4.2 	gcc-4.7.2