new plug-ins added to MarvinPluginCollection

git-svn-id: http://svn.code.sf.net/p/marvinproject/code/dev@123 ccb5e5b0-b481-49e6-8c11-d5b444fbd5f0
sample refactoring

git-svn-id: http://svn.code.sf.net/p/marvinproject/code/dev@124 ccb5e5b0-b481-49e6-8c11-d5b444fbd5f0