make test runner compatible with node 0.6
make test runner compatible with node 0.6

CodeFridge/libxmljs_mem,sergeche/libxmljs,apeace/libxmljs,polotek/libxmljs,polotek/libxmljs,polotek/libxmljs,Konsus/libxml,Visya/libxmljs,sergeche/libxmljs,sergeche/libxmljs,Konsus/libxml,hildjj/libxmljs,libxmljs/libxmljs,rc0x03/libxmljs,Konsus/libxml,hildjj/libxmljs,Visya/libxmljs,libxmljs/libxmljs,rc0x03/libxmljs,gagern/libxmljs,CodeFridge/libxmljs_mem,rchipka/libxmljs,apeace/libxmljs,hildjj/libxmljs,improvisio-software/libxmljs,gagern/libxmljs,rchipka/libxmljs,Visya/libxmljs,improvisio-software/libxmljs,CodeFridge/libxmljs_mem,gagern/libxmljs,improvisio-software/libxmljs,libxmljs/libxmljs,rc0x03/libxmljs,rchipka/libxmljs