Update INSTALL.md
Update INSTALL.md

Editing the Markdown links in INSTALL.md to improve the readability of the raw text.

zbeekman/opencoarrays,jerryd/opencoarrays,sourceryinstitute/opencoarrays,zbeekman/opencoarrays,sourceryinstitute/opencoarrays,sourceryinstitute/opencoarrays,jerryd/opencoarrays,jerryd/opencoarrays,zbeekman/opencoarrays