GraphViz integration

apparently graphviz does not like php 5.3.x

Strict warning: Non-static method System::mktemp() should not be called statically, assuming $this from incompatible context in Image_GraphViz->saveParsedGraph() (line 1005 of /usr/local/Cellar/php/5.3.8/lib/php/Image/GraphViz.php).
Strict warning: Non-static method System::_parseArgs() should not be called statically, assuming $this from incompatible context in System->mktemp() (line 393 of /usr/local/Cellar/php/5.3.8/lib/php/System.php).
Strict warning: Non-static method Console_Getopt::getopt2() should not be called statically, assuming $this from incompatible context in System->_parseArgs() (line 84 of /usr/local/Cellar/php/5.3.8/lib/php/System.php).
Strict warning: Non-static method Console_Getopt::doGetopt() should not be called statically, assuming $this from incompatible context in Console_Getopt->getopt2() (line 75 of /usr/local/Cellar/php/5.3.8/lib/php/Console/Getopt.php).
Strict warning: Non-static method PEAR::isError() should not be called statically, assuming $this from incompatible context in Console_Getopt->doGetopt() (line 109 of /usr/local/Cellar/php/5.3.8/lib/php/Console/Getopt.php).

etc....

XRef Graph API #1806520: How to provide support for graphviz (properly)

I use PHP 5.3.10-1ubuntu3.4 with Suhosin-Patch (cli) along with graphviz_filter and can't confirm the general issues with php 5.3.x

I'm not sure but as state machine has views integration why not use Graph API as the workflow renderer.

Graph API needs nodes + links and can render to several 'graph' engines like thejit, d3, graph phyz and (almost) to graphviz_filter.

That would relieve state machine from integration with graphviz_filter.

I have to fix #1209526: Add support for graphviz_filter module quick but @s.Daniel provided for a simple patch.