Release 1.6.2

```
Bob the Builder (1):
      Stirling 1.6.2-SNAPSHOT

Jussi Virtanen (13):
      project: Set 'jmock' dependency scope to 'test'
      fix: Consolidate message traits
      fix: Remove RequestMessage interface
      fix: Rename UserDefinedMessage to TradeCancelCorrect
      fix: Convert NewOrderSingle to Scala
      fix: Convert OrderCancelRequest to Scala
      fix: Reformat message traits
      fix: Convert Heartbeat to Scala
      fix: Convert Logout to Scala
      fix: Convert ResendRequest to Scala
      fix: Convert SequenceReset to Scala
      fix: Convert TestRequest to Scala
      Merge pull request #155 from vaine/features/lime-381

Pekka Enberg (3):
      Merge pull request #152 from valotrading/releases/1.6.1
      Merge pull request #153 from jvirtanen/cleanups/fix-message-trait
      Merge pull request #154 from jvirtanen/cleanups/fix-message

Ville Aine (4):
      Add Near- and FarPegOffset to Lime specific NewOrderSingle
      Add Lime specific PegType(9034) value PennySpreadMidPoint
      Add Lime specific TimeInForce(59) values
      Fix typo in PegType member name
```