Removed 'nose' from develop installation instructions
Removed 'nose' from develop installation instructions

Nikea/scikit-xray,scikit-xray/scikit-xray,Nikea/scikit-xray,tacaswell/scikit-xray,tacaswell/scikit-beam,tacaswell/scikit-beam,Nikea/scikit-xray,scikit-xray/scikit-xray,scikit-xray/scikit-xray,tacaswell/scikit-beam,tacaswell/scikit-xray,tacaswell/scikit-xray