v0.2.0

• added IBEAM_REQUEST_RETRIES env var used during maintenance to determine how many times should IBeam attempt to communicate with the Gateway before attempting reauthentication
• added IBEAM_REQUEST_TIMEOUT env var defining the timeout for requests to the Gateway in seconds.
• added IBEAM_OAUTH_TIMEOUT env var defining the timeout for login.
• now uses tickle to verify authentication and extend sessions, instead of validate
• now checks for authentication status apart from successful requests
• deprecated -l/--validate standalone argument
• added -c / --check standalone argument to check if Gateway's session is authenticated