CHANGES IN RPREDICTIT VERSION 0.1.0

BUGFIX: date time format string updated to account for AM and PM timestamps coming from PredictIt.
BUGFIX: functions related to defunct tweet markets are now deprecated.

CHANGES IN RPREDICTIT VERSION 0.0.2

BUGFIX: improve error handling for rate limits, so vignette and examples pass R CMD check without WARNINGs.