updated the configure.sh script to also install parity on MacOS#13

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MarshallAsch wants to merge 2 commits intoRightMesh:masterfrom

MarshallAsch:master

Commits on Jul 17, 2018

updated the configure.sh script to also install parity on MacOS
MarshallAsch
committed

Commits on Jul 19, 2018

updated comments that @FrazerSeymour requested
MarshallAsch
committed