TransactionRecorder tests
Append head transactions without stack overflow

Implemented with a while loop. Cannot be implemented as tail recursive because of the catch statement.
Pre-review  cleanup
No more consistency error on unexpected reponse + cleanup
Merge pull request #84 from wajam/manu-tx-recorder-tests

TransactionRecorder tests
Merge branch 'master' into olivier-mvalue
MValue migration
Some test still failing
Better way to import "Type"
Better way to import "Type"
Merge branch 'olivier-mvalue' into olivier-mvalue-staging
Merge pull request #83 from wajam/olivier-mvalue

Value wrapper and serialization of it, to replace any, and avoid crazy migration
Fixed broken tests
Fixed confusing stacktrace w/ logging
Merge branch 'olivier-mvalue-staging' into olivier-mvalue
Replace explicit cast with implicit
Import cleanup