A Windows access denied bug was fixed. Graphs now use different colors depending on the number of calls made to each function. Graph settings and look are now very customizable. Exclude and include filters have been added. stop_trace() is not required anymore as it is called automatically by make_graph(). pycallgraph will throw an exception if there is an error from dot/neato. An obvious use of __main__ as the module name was removed and some examples were added.
