Moved stuff that is common to PDF and PS to Pattern
Removed PSPattern class and no longer necessary PDF and PS sub-classes of GradientMaker


git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/FOP-2393_gradient-rendering@1610532 13f79535-47bb-0310-9956-ffa450edef68
Renamed shading package to gradient


git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/FOP-2393_gradient-rendering@1610534 13f79535-47bb-0310-9956-ffa450edef68
Delegate function rendering to dedicated class intead of taking as parameter a list of Strings coming from who knows where


git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/FOP-2393_gradient-rendering@1610535 13f79535-47bb-0310-9956-ffa450edef68
Rename toWriteableString into output and added StringBuilder parameter


git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/FOP-2393_gradient-rendering@1610537 13f79535-47bb-0310-9956-ffa450edef68
Factorized outputDoubles into GradientMaker
Removed conversion to Double when unnecessary


git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/FOP-2393_gradient-rendering@1610538 13f79535-47bb-0310-9956-ffa450edef68
Use the appropriate double formatter depending on the selected output


git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/FOP-2393_gradient-rendering@1610539 13f79535-47bb-0310-9956-ffa450edef68
createPDFPattern can be made private


git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/FOP-2393_gradient-rendering@1610540 13f79535-47bb-0310-9956-ffa450edef68