Rename PSDrawDoc to PsDoc, reduce .py file count.

Follow-up to code review, see the bug# 6883.

svn: r22808

po/POTFILES.in

@@ -235,7 +235,7 @@ src/plugins/docgen/GtkPrint.py
 src/plugins/docgen/HtmlDoc.py
 src/plugins/docgen/LaTeXDoc.py
 src/plugins/docgen/ODFDoc.py
-src/plugins/docgen/PSDrawDoc.py
+src/plugins/docgen/cairodoc.py
 src/plugins/docgen/RTFDoc.py
 src/plugins/docgen/SvgDrawDoc.py
 

po/POTFILES.skip

@@ -283,9 +283,6 @@ src/Merge/test/merge_ref_test.py
 # plugins gpr directory
 src/plugins/sidebar/sidebar.gpr.py
 
-# plugins/docgen directory
-src/plugins/docgen/PdfDoc.py
-
 # plugins/lib directory
 src/plugins/lib/libformatting.py
 src/plugins/lib/libgrampsxml.py