Add command-line-args package. Remove reference to istanbul branch. Figure out which istanbul version to install that supports es6.
Add command-line-args package. Remove reference to istanbul branch. Figure out which istanbul version to install that supports es6.

materials-commons/materialscommons.org,materials-commons/materialscommons.org,materials-commons/materialscommons.org,materials-commons/materialscommons.org,materials-commons/materialscommons.org