Release of 2.1.0

• Add convertMapToTwoColumnsFormattedTable() to RoddyIOHelperMethods. This was taken from one of the Roddy classes and can be used generically. Also changed its name to convertMapToTwoColumnsPrettyTable()
• Add the DateTimeHelper class, which tries to reduces the necessity to fiddle around with the Joda-Time and the Java time classes:
  • By default, the class will parse ISO_DATE_TIME strings but can be constructed with different patterns and time zones.
  • parseToZonedDateTime() will use the pattern in the constructor or the default pattern to parse a time string.
  • differenceBetween() will calculate the duration between two LocalDateTimes
  • durationExceeds() will tell you, if a Duration is higher than a Duration called maxAge. Alternatively, you can also call the method with values for days, hours and so on.
• Change the gradle config to show detailed error messages and exceptions in the Travis logs.