add readme

Makefile_

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+PACKAGES=x11 xcomposite xfixes xdamage xrender
+LIBS=`pkg-config --libs ${PACKAGES}` -lm
+INCS=`pkg-config --cflags ${PACKAGES}`
+CFLAGS = -Wall
+
+.c.o:
+	$(CC) $(CFLAGS) $(INCS) -c $*.c
+
+OBJS=xcompmgr.o
+
+xcompmgr: $(OBJS)
+	$(CC) $(CFLAGS) -o $@ $(OBJS) $(LIBS)
+
+$(OBJS): xcompmgr.h
+
+install:
+	cp -t /usr/bin/local xcompmgr
+
+clean:
+	rm -f $(OBJS) xcompmgr
+
+.PHONY: install clean

README.md

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+# Compton
+
+__Compton__ is a compositor for X, and a fork of __xcompmgr-dana__.
+
+I was frustrated by the low amount of standalone lightweight compositors.
+Compton was forked from Dana Jansens' fork of xcompmgr and refactored.  I fixed
+whatever bug I found, and added features I wanted. Things seem stable, but don't
+quote me on it. I will most likely be actively working on this until I get the
+features I want. This is also a learning experience for me. That is, I'm
+partially doing this out of a desire to learn Xlib.
+
+## Changes from xcompmgr:
+
+* __inactive window transparency__ (specified with `-i`)
+* shadows are now enabled for argb windows, e.g. terminals with transparency
+* removed serverside shadows (and simple compositing) to clean the code,
+  the only option that remains is clientside shadows
+* titlebar transparency (and possibly border transparency) is on the way
+* menu transparency (thanks to Dana)
+
+## Fixes from the original xcompmgr:
+
+* fixed a segfault when opening certain window types
+* fixed a memory leak caused by not freeing up shadows (from the freedesktop
+  repo)
+
+## License
+
+xcompmgr has gotten around. As far as I can tell, the lineage for this
+particular tree is something like:
+
+* Keith Packard (original author)
+* Matthew Hawn
+* ...
+* Dana Jansens
+* Myself
+
+Not counting the tens of people who forked it in between.
+
+Keith Packard's original license remains in the source.
+
+## Building
+
+The same dependencies and build as xcompmgr.
+
+### Dependencies:
+
+* libx11
+* libxcomposite
+* libxdamage
+* libxfixes
+* libxrender
+* autoconf
+
+To build, make sure you have the above dependencies:
+
+``` bash
+$ ./autogen.sh
+$ make
+```
+
+The above will produce a single binary.
+
+## Usage
+
+``` bash
+$ xcompmgr -cC -t -5 -l -5 -r 5 -o 0.5 -fF -I 0.065 -O 0.065 -D 6 -m 0.8 -i &
+
+$ xcompmgr -cC -t -5 -l -5 -r 5 -o 0.5 -i &
+```

xcompmgr.h

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+