synchronize the initialized snippet list access for avoiding concurrent error

git-svn-id: http://svn.patent-office.jp/repos/develop/eureika_2013/project/trunk/eureika@16942 c148c8b9-5c34-4071-8587-f0408d8675ae
fix the warning condition of wrong declared blocks

git-svn-id: http://svn.patent-office.jp/repos/develop/eureika_2013/project/trunk/eureika@17251 c148c8b9-5c34-4071-8587-f0408d8675ae
allow Renderer to work with variant types such as primitive wrapper classes and raw Object type

git-svn-id: http://svn.patent-office.jp/repos/develop/eureika_2013/project/trunk/eureika@17164 c148c8b9-5c34-4071-8587-f0408d8675ae