Disable failing test temporarily
Disable failing test temporarily

See issue 29

https://github.com/mindriot101/rust-fitsio/issues/29

mindriot101/rust-fitsio,mindriot101/rust-fitsio,mindriot101/rust-cfitsio,mindriot101/rust-fitsio,mindriot101/rust-cfitsio,mindriot101/rust-fitsio,mindriot101/rust-fitsio