* fixes #2706, #2828, #2704, refs #1721, #2637, #2711, #2318, #71 : horizontal static graph implemented
 * fixes #2788, refs #2670, #1721, #2637, #2711 : default graph type logic moved to ImageGraph API, improved date/period logic, new parameter graphs_default_period_to_plot_when_period_range
 * fixes #2704, #2804, refs #1721 : pChart updated to 2.1.3, pChart code removed from Piwik code, OOP refactoring, support for unifont.ttf if present in ImageGraph/fonts, testAllSizes now uses report metadata ImageGraphUrl
 * refs #71 : space between report title and report table reduced to avoid page overflow
 * refs #2829 : TODO display percentages
 * r5544, r5547, r5549 merged

git-svn-id: http://dev.piwik.org/svn/trunk@5582 59fd770c-687e-43c8-a1e3-f5a4ff64c105