resolved #103 (make install BINDIR=$HOME/bin)

Author: lh3

Makefile

@@ -1,10 +1,14 @@
 CC=gcc
 CFLAGS=-g -Wall -O2 -Wno-unused-function
+BINDIR=/usr/local/bin
 
 all:seqtk
 
 seqtk:seqtk.c khash.h kseq.h
 		$(CC) $(CFLAGS) seqtk.c -o $@ -lz -lm
 
+install:all
+		install seqtk $(BINDIR)
+
 clean:
 		rm -fr gmon.out *.o ext/*.o a.out seqtk trimadap *~ *.a *.dSYM session*