Prepare SVG export with wx30

git-svn-id: http://svn.code.sf.net/p/codeblocks/code/trunk@9936 2a5c6006-c6dd-42ca-98ab-0921f2732cef
Applied patch CB_PCH_fix_headers created from old build/cbPCHeadersFixed branch.
Only committed the items NOT in the Contrib folder at this time.
Applied patch CB_PCH_fix_headers created from old build/cbPCHeadersFixed branch.
Committed the items the Contrib folder at this time.
Added include of wx/msw/winundef.h to fix weird compiler error.