Inconsistent off-chain module structure

[jstolarek]

In off-chain code we have a dedicated directory TrustlessSidechain.Utils for utility modules such as:

TrustlessSidechain.Utils.Address
TrustlessSidechain.Utils.Codecs
TrustlessSidechain.Utils.Scripts
TrustlessSidechain.Utils.Transaction

and then we have more utility modules that reside in namespaces for which the naming hierarchy is reversed:

TrustlessSidechain.Checkpoint.Utils
TrustlessSidechain.DParameter.Utils
TrustlessSidechain.MerkleRoot.Utils
TrustlessSidechain.UpdateCommitteeHash.Utils

It would be good to be consistent about this. I personally favour the first approach.