SessionInfoLibrary   "SessionInfo" 
Utility functions for session specific information like the bar index of the session.
 inSession(spec)  Returns true if the current bar is in the session specification.
  Parameters:
     spec : session.regular (default), session.extended or other time spec.
  Returns: True if the current is in session; otherwise false.
 minutesToLen(minutes, multiple)  Converts the number of minutes to a length to be used with indicators.
  Parameters:
     minutes : The number of minutes.
     multiple : The length multiplier.
  Returns: math.ceil(minutes * multiple / timeframe.multiplier)
 bar(spec, res)  Returns the intraday bar index.  May not always map directly to time as a bars can be skipped.
  Parameters:
     spec : session.regular (default), session.extended or other time spec.
     res : The resolution (default = "1440").
  Returns: The integer index of the bar of the session.
 isFirstBar(spec, res)  Returns true if the current bar is the first one of the session.
  Parameters:
     spec : session.regular (default), session.extended or other time spec.
     res : The resolution (default = "1440").
  Returns: True if the current bar is the first one of the session.
 wasLastBar(spec, res)  Returns Returns true if the previous bar was the last of the session.
  Parameters:
     spec : session.regular (default), session.extended or other time spec.
     res : The resolution (default = "1440").
  Returns: True if was the last bar of the session.

