amr-build: rewrite Makefile
amr-build: include missing typedefs
amr-build: remove obsolete makefiles
amr-build: use extra defs
amr-build: remove encoder/decoder executables from target linkage
amr-build: remove encoder/decoder
amr-build: get rid of .a, use builtin.o instead
Merge remote-tracking branch 'gegel/master' into amr-build
Merge remote-tracking branch 'gegel/master' into amr-build
Merge pull request #23 from pfactum/amr-build

Refine amr build