[Admin]: Added some checking in igraphRSource installer
[Admin]: Added some checking in igraphRSource installer


Former-commit-id: f5b0f690e6d0baefe3fd834dbcc6181cbbf9032b [formerly 824d903876708f58935929ce4051bb6646782029] [formerly cfd74e6d82945eee1ed226d6b5467d63b1e80ddb [formerly 2649b2d0f5e6ec07f81f18ff2f0353622bb2a78a]]
Former-commit-id: 570c2b32bcf87261d3cee0e32f63afe6e027bec6
Former-commit-id: a49d9ef65d4a0cf6985515850fe7972131c4a54c
neurodata/ndgrutedb,openconnectome/m2g,openconnectome/m2g,neurodata/ndgrutedb,neurodata/ndgrutedb,neurodata/ndgrutedb,openconnectome/m2g,openconnectome/m2g,neurodata/ndmg,neurodata/ndgrutedb,neurodata/ndgrutedb,neurodata/ndgrutedb,openconnectome/m2g,openconnectome/m2g,openconnectome/m2g,openconnectome/m2g,neurodata/ndgrutedb