Update mcservers for easier updates
Update mcservers for easier updates

Updated mcservers:

  * to support an expected user account
  * to correctly parse arguments
  * to optionally build mcstore
  * added an update command for deploying a new version of materials commons

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