Statistical test for guilds & display

[JuanRivasSantisteban]

A major update can consist of a new module for computing, generating and displaying several suitable statistical tests for compositional analysis.

[JuanRivasSantisteban]

Of course, it should work considering the dimensions of the guild_tensor

[JuanRivasSantisteban]

To consider - doi: 10.5808/GI.2019.17.1.e6