Removed version requirements for scipy, nose.
Removed version requirements for scipy, nose.

amandersillinois/landlab,cmshobe/landlab,amandersillinois/landlab,laijingtao/landlab,ManuSchmi88/landlab,cmshobe/landlab,SiccarPoint/landlab,ManuSchmi88/landlab,RondaStrauch/landlab,csherwood-usgs/landlab,Carralex/landlab,csherwood-usgs/landlab,ManuSchmi88/landlab,Carralex/landlab,landlab/landlab,landlab/landlab,landlab/landlab,Carralex/landlab,laijingtao/landlab,SiccarPoint/landlab,cmshobe/landlab,RondaStrauch/landlab,RondaStrauch/landlab