safer SConstruct v8 detection; fixes issue 13
safer SConstruct v8 detection; fixes issue 13

shelsonjava/TeaJS,ondras/TeaJS,shelsonjava/TeaJS,ondras/TeaJS,ondras/TeaJS,shelsonjava/TeaJS,shelsonjava/TeaJS,shelsonjava/TeaJS,ondras/TeaJS