* include/Image/Graph/Plot/Bubble.php: New chart type: bubble
* include/Image/Graph.php: Add the new bubble chart to the available charts
* include/functions.php: Refactoring way to get type of graph from module type
* operation/agentes/estado_ultimopaquete.php: Added links to access log4x graphics
* include/fgraph.php: Add log4x graphics rutines.
* operation/agentes/stat_win.php: Add support to show log4x graphic.
git-svn-id: https://svn.code.sf.net/p/pandora/code/trunk@2512 c3f86ba8-e40f-0410-aaad-9ba5e7f4b01f
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