Add scaling and transformations to move the PieChart into a valid coordinate system and reduce the offset of the labels to make more efficient use of available space.
This reverts commit 87a59675011a4cf284d8e44c4fb66042ad84c39f.
At least 'modules/doc/run.php' issues a warning about "The use statement with non-compound name 'Zend_Controller_Router_Route' has no effect"
Allows getPieSlicePath to draw a full circle pie slice (100%) by slightly adjusting endpoint to have a valid arc. Also hides a central line as there will be no more pie slices.
Use explizit number formatting instead of implicit type conversions when
rendering SVGs, to prevent a change of the locale from breaking the charts.
fixes#6585
Use floats as path coordinates in PieSlices, to
avoid that the start and ending position of the arc are at the exact same
position. This would cause buggy behavior, when displaying values like "99,999%".
refs #5863
