pybootchartgui: add the original code

This is from:
http://pybootchartgui.googlecode.com/files/pybootchartgui-r124.tar.gz

Will modify it to make the build profiling in pictures.

Remove the examples since they would not work any more, and they cost
much disk space.

[YOCTO #2403]

(From OE-Core rev: 1f0791109e1aed715f02945834d6d7fdb9a411b4)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/pybootchartgui/pybootchartgui/batch.py

@@ -0,0 +1,23 @@
+import cairo
+
+import draw
+
+def render(res, format, filename):
+    handlers = {
+        "png": (lambda w,h: cairo.ImageSurface(cairo.FORMAT_ARGB32,w,h), lambda sfc: sfc.write_to_png(filename)),
+        "pdf": (lambda w,h: cairo.PDFSurface(filename, w, h), lambda sfc: 0),
+        "svg": (lambda w,h: cairo.SVGSurface(filename, w, h), lambda sfc: 0)
+    }
+
+    if not(handlers.has_key(format)):
+        print "Unknown format '%s'." % format
+        return 10
+
+    make_surface, write_surface = handlers[format]
+    w,h = draw.extents(*res)
+    w = max(w, draw.MIN_IMG_W)
+    surface = make_surface(w,h)
+    ctx = cairo.Context(surface)
+    draw.render(ctx, *res)
+    write_surface(surface)
+