Tests fail

`test_t1.jl` can run without error if 

`Gmsh.initialize()` --> `gmsh.initialize()`
`Gmsh.finalize()` --> `gmsh.finalize()`

`test_t16.jl` fails on line 9
`gmsh.model.occ.addBox(0,0,0, 1,1,1, 1)` with error: `gmshModelOccAddBox returned non-zero error code: 1`

this seems to happen for all of the `gmsh.model.occ` elements