add .ipynb_checkpoints to .gitignore
add .ipynb_checkpoints to .gitignore

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