Add logo, favicon.

Thanks to Michael Sersen for creating images/Logo.svg.

- Add images directory with original SVG logo, favicon, and some
  derivative PNGs of the logo for different purpose.

- Note that license on images/* is CC BY-SA.

- Add utils/img2js.py to take an image and generate a base64 encoded
  data URI string.

- Add base64 encoded data URI screen logo to display in canvas when
  disconnected.

utils/img2js.py

@@ -0,0 +1,40 @@
+#!/usr/bin/python
+
+#
+# Convert image to Javascript compatible base64 Data URI
+# Copyright 2011 Joel Martin
+# Licensed under LGPL version 3 (see docs/LICENSE.LGPL-3)
+#
+
+import sys, base64
+
+try:
+    from PIL import Image
+except:
+    print "python PIL module required (python-imaging package)"
+    sys.exit(1)
+
+
+if len(sys.argv) < 3:
+    print "Usage: %s IMAGE JS_VARIABLE" % sys.argv[0]
+    sys.exit(1)
+
+fname = sys.argv[1]
+var   = sys.argv[2]
+
+ext = fname.lower().split('.')[-1]
+if   ext == "png":            mime = "image/png"
+elif ext in ["jpg", "jpeg"]:  mime = "image/jpeg"
+elif ext == "gif":            mime = "image/gif"
+else:
+    print "Only PNG, JPEG and GIF images are supported"
+    sys.exit(1)
+uri = "data:%s;base64," % mime
+
+im = Image.open(fname)
+w, h = im.size
+
+raw = open(fname).read()
+
+print '%s = {"width": %s, "height": %s, "data": "%s%s"};' % (
+        var, w, h, uri, base64.b64encode(raw))