Changed the build system to drop I2C for now. Seems to cause too many issues

on non Raspbian systems (and even on some Raspbian systems it would appear ):

fixed a timing issue on softTone
fixed some issues in wiringPisetup introduced when optimising the mmap calls.

examples/Makefile

@@ -30,7 +30,7 @@ INCLUDE	= -I/usr/local/include
 CFLAGS	= $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
 
 LDFLAGS	= -L/usr/local/lib
-LDLIBS    = -lwiringPi
+LDLIBS    = -lwiringPi -lpthread -lm
 
 # Should not alter anything below this line
 ###############################################################################
@@ -44,6 +44,13 @@ OBJ	=	$(SRC:.c=.o)
 
 BINS	=	$(SRC:.c=)
 
+# Note:
+#	Please don't waste your time by emailling me or doing a
+#	pull request with changes to make all these targets. It
+#	is intentional that I do it this way as it now takes too
+#	long to compile them all and most people will not run
+#	them anyway... -GH-
+
 all:	
 	@cat README.TXT
 	@echo "    $(BINS)" | fmt
@@ -75,19 +82,19 @@ isr:	isr.o
 
 piface:	piface.o
 	@echo [link]
-	@$(CC) -o $@ piface.o $(LDFLAGS) $(LDLIBS) -lpthread
+	@$(CC) -o $@ piface.o $(LDFLAGS) $(LDLIBS)
 
 gertboard:	gertboard.o
 	@echo [link]
-	@$(CC) -o $@ gertboard.o $(LDFLAGS) $(LDLIBS) -lm
+	@$(CC) -o $@ gertboard.o $(LDFLAGS) $(LDLIBS)
 
 nes:	nes.o
 	@echo [link]
-	@$(CC) -o $@ nes.o $(LDFLAGS) $(LDLIBS) -lm
+	@$(CC) -o $@ nes.o $(LDFLAGS) $(LDLIBS) 
 
 pwm:	pwm.o
 	@echo [link]
-	@$(CC) -o $@ pwm.o $(LDFLAGS) $(LDLIBS) -lm -lpthread
+	@$(CC) -o $@ pwm.o $(LDFLAGS) $(LDLIBS)
 
 delayTest:	delayTest.o
 	@echo [link]