Parse the timezone of Excoin orders

[Desrever Nu]

The current implementation cannot parse correctly some dates.

To get around the exception the Wrapper is now avoiding parsing the timezone.

//2014-12-19T16:02:07.961Z sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");

Find the correct date format to include timezone

[Sam Griffiths]

The date parser has been updated to account correctly for the second potential date format returned by Excoin. Tested the format and happy that it is now working.