[*] Fixed reading datum token from datum. Also, the size of the emission token datum has been added to the PyDapChainDatumTokenEmissionObject structure.

[*] Fixed a bug related to reading signatures from the datum of an emission token with the TOKEN_EMISSION_TYPE_AUTH type.

[*] Moved implementation of wrapper and implementation of attributes to get information from token datum and emission token datum from features-5386 branch.