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/README

@@ -0,0 +1,36 @@
+			    PYBOOTCHARTGUI
+			   ----------------
+
+pybootchartgui is a tool for visualization and analysis of the
+GNU/Linux boot process. It renders the output of the boot-logger tool
+bootchart (see http://www.bootchart.org/) to either the screen or
+files of various formats. Bootchart collects information about the
+processes, their dependencies, and resource consumption during boot of
+a GNU/Linux system. The pybootchartgui tools visualizes the process
+tree and overall resource utilization.
+
+pybootchartgui is a port of the visualization part of bootchart from
+Java to Python and Cairo.
+
+Adapted from the bootchart-documentation:
+
+  The CPU and disk statistics are used to render stacked area and line
+  charts. The process information is used to create a Gantt chart
+  showing process dependency, states and CPU usage.
+
+  A typical boot sequence consists of several hundred processes. Since
+  it is difficult to visualize such amount of data in a comprehensible
+  way, tree pruning is utilized. Idle background processes and
+  short-lived processes are removed. Similar processes running in
+  parallel are also merged together.
+
+  Finally, the performance and dependency charts are rendered as a
+  single image to either the screen or in PNG, PDF or SVG format.
+
+
+To get help for pybootchartgui, run
+
+$ pybootchartgui --help
+
+
+http://code.google.com/p/pybootchartgui/