Merge pull request #17 from mgcam/devel

common methods and accessors moved to epp parent
Removed Encode module from Build.PL as not used

Added date_received module

Added date received test

Refactored epp scripts a little

Moved some xml element creation into a moose utility role.

Added some POD for clarity_elements
Added DateTime module to Build.PL
Merge pull request #19 from jbeast/date_received

Date Received task
Merge branch 'devel' of github.com:wtsi-clarity/wtsi_clarity into devel
build file and changes update