TODO

- cache submission status and fetch only the latest

- create .uva-node dir in ~
  store account-specific settings in a separate file
  ~/.uva-node/uva-lucastan
  ~/.uva-node/main
  ~/.uva-node/uva

- login only once.
  if send fails due to not login, then auto-login and retry

- allow gzip compression when fetching the data ... see node.js docs on how to decompress

- util.fetch to combine both util.createReq and util.createEndCallback
 - create webUtil
 - auto remove error listener

- add version command to check version of uva-node
- add help command to show commands (needs a structure to store commands)

- allow running arbitrary shell commands

- test command to compile and run tests
  - output results and timing

- test 123 
    - will do <extension completion>
    - will compile
    - if compile ok, then run 123-?.in or *.in