Package Upgrade/Migration Logic

gistfile1.txt

````js
//packages/clinical-router/lib/version_conflict_error.js
if (Package['cmather:iron-router']) {
  throw new Error("\n\n\
    Sorry! The cmather:iron-{x} packages were migrated to the new package system with the wrong name, and you have duplicate copies.\n\
    You can see which cmather:iron-{x} packages have been installed by using this command:\n\n\
    > meteor list\n\n\
    Can you remove any installed cmather:iron-{x} packages like this:\
    \n\n\
    > meteor remove cmather:iron-core\n\
    > meteor remove cmather:iron-router\n\
    > meteor remove cmather:iron-dynamic-template\n\
    > meteor remove cmather:iron-dynamic-layout\n\
    \n\
    The new packages are named iron:{x}. For example:\n\n\
    > meteor add iron:router\n\n\
    Sorry for the hassle, but thank you!\
    \n\n\
  ");
}
````