updated to meteor 1.0
Further support for linux platform:

  - Added check un run.sh to choose correct atom-shell binary
  - Renamed $OS_PLATFORM to $OS_ARCH to keep information on
    platform sans architecture (for above change)
Upped nodejs to 0.10.33 and Atom-shell to 0.19.4
Merge pull request #3 from eripa/master

Updated versions and better Linux platform awareness