Set better lib/plugin locations

git-svn-id: file:///svn/Scribus/trunk/Scribus@19674 11d20701-8431-0410-a711-e3c959e3b870
Bump scplugin version

git-svn-id: file:///svn/Scribus/trunk/Scribus@19675 11d20701-8431-0410-a711-e3c959e3b870
Adjust CMakeLists for new lib dir

git-svn-id: file:///svn/Scribus/trunk/Scribus@19676 11d20701-8431-0410-a711-e3c959e3b870