progress(): Very simple ASCII progress bar from troglobit/toolbox@f98c5d0

This patch adds a very simple progress bar I wrote once.  It's revision
f98c5d0 from https://github.com/troglobit/toolbox

Also included in this patch is conio.h, a neat little set of macros for
manipulating your terminal using ANSI escape seequences.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

Makefile

@@ -34,7 +34,7 @@ CPPFLAGS   += -W -Wall
 DISTFILES   = README LICENSE
 HEADERS     = lite.h
 OBJS       := chomp.o copyfile.o dir.o fexist.o fisdir.o fmode.o fsendfile.o
-OBJS       += ifconfig.o makepath.o pidfile.o pidfilefn.o rsync.o
+OBJS       += ifconfig.o makepath.o pidfile.o pidfilefn.o progress.o rsync.o
 OBJS       += strlcpy.o strlcat.o strtonum.o tempfile.o tree.o
 DEPS       := $(OBJS:.o=.d)
 JUNK        = *~ *.bak *.map .*.d *.d DEADJOE semantic.cache *.gdb *.elf core core.*