normalise postcode if valid and re-write to the session
cașitaize postcodes if present and valid
Merge branch 'master' into postcode_capitalization

* master:
  Addition of Romanian, Czech, Slovak, Latvian, Lithuanian, Hungarian and Turkish characters
  Add romanian characters
  Translate o-macrom
  String normalizer.hash_to_ascii, and normalise claim hash
  specs for String Normalizer
  string normaliser class
getting rid of the dreaded whitespace
substitute upper case postcodes for lower case in the test so that postcode normalization is stestsd
Merge pull request #522 from ministryofjustice/postcode_capitalization

Postcode capitalization