* [NOD-848] Optimize allocations when serializing UTXO diffs
* [NOD-848] Use same UTXO serialization everywhere, and use compression as well
* [NOD-848] Fix usage of wrong buffer
* [NOD-848] Fix tests
* [NOD-848] Fix wire tests
* [NOD-848] Fix tests
* [NOD-848] Remove VLQ
* [NOD-848] Fix comments
* [NOD-848] Add varint for big endian encoding
* [NOD-848] In TestVarIntWire, assume the expected decoded value is the same as the serialization input
* [NOD-848] Serialize outpoint index with big endian varint
* [NOD-848] Remove p2pk from compression support
* [NOD-848] Fix comments
* [NOD-848] Remove p2pk from decompression support
* [NOD-848] Make entry compression optional
* [NOD-848] Fix tests
* [NOD-848] Fix comments and var names
* [NOD-848] Remove UTXO compression
* [NOD-848] Fix tests
* [NOD-848] Remove big endian varint
* [NOD-848] Fix comments
* [NOD-848] Rename ReadVarIntLittleEndian->ReadVarInt and fix WriteVarInt comment
* [NOD-848] Add outpointIndexByteOrder variable
* [NOD-848] Remove redundant comment
* [NOD-848] Fix outpointMaxSerializeSize to the correct value
* [NOD-848] Move subBuffer to utils