Release 1.4.2

```
Bob the Builder (1):
      Stirling 1.4.2-SNAPSHOT

Jussi Virtanen (31):
      Add simpler Session constructor
      Take simpler Session constructor into use
      Remove Fields
      Remove 'EnumTag#parse'
      Fix DiskSessionStoreSpec
      Set required status in Field constructor
      Set required status in RepeatingGroup constructor
      Remove 'Field#setRequired'
      Rename 'Field#isRequired' to 'required'
      Remove 'Field#hasSingleTag'
      Remove InvalidValueForTagException
      Remove 'Field#isFormatValid'
      Remove 'Field#isValueValid'
      Enhance InvalidValueFormatException message
      Enhance InvalidValueException message
      Remove 'Field#isMissing'
      Remove 'Field#isConditional'
      Remove 'Field#isEmpty'
      Remove 'Field#prettyName'
      Add TargetSubID(57) to Lime specific Logon
      Make Username(553) required in Lime specific Logon
      Add TimeInMarket(9001) to Lime specific NewOrderSingle
      Add ISOGroupID(9060) to Lime specific NewOrderSingle
      Add Lime specific TimeInForce(59) value OnOpenThenDay
      Add Lime specific PegType(9034) value DiscretionaryMidpoint
      Reorder Lime specific messages
      Remove TransactTime(60) from Lime specific OrderCancelRequest
      Reorder fields in Lime specific ExecutionReport
      Add NbboWeightIndicator(9511) to Lime specific ExecutionReport
      Add TargetLocationID(143)
      Add venue specific tags to Lime specific NewOrderSingle

Pekka Enberg (7):
      Merge pull request #126 from valotrading/releases/1.4.1
      Merge pull request #127 from jvirtanen/features/simpler-session-constructor
      Merge pull request #128 from jvirtanen/cleanups/fields
      Merge pull request #129 from jvirtanen/cleanups/enum-tag-parse
      Merge pull request #130 from jvirtanen/fixes/disk-session-store-spec
      Merge pull request #131 from jvirtanen/cleanups/field
      Merge pull request #132 from jvirtanen/fixes/lime-fix
```