Version 0.2. Changed the structure of agents, to better integrate the geotrait. Changes have telescoped to accessor get_geo that now takes t as an argument, and all the functions that are using it.

added function clean_world, and beta and alpha diversity ( to be continued). Modified Plots.plot, mainly for integrating the geotrait into option "x" and "xs"

version 0.1.8, with new documentation, old competition and birth function deleted because now passed by the used.

Changes on type Agent, that is now Agent{T,U}. Added a function increment! for type Agent{MixedAgent,U}.

Introducing new abstract type to distinguish between different types of agents : continuous, discrete or mixed.

Test have also been modified, because it seems that this change also changes the random seed.

reflected is now passed as an argument in p
an other argument "dt_saving" is introduced in p for Gillepsie, which allows one to save results every dt_saving step instead of fixed number. if not specified, only last time step is saved.

* origin/no_C_matrix:
  uploading jld2 wrightfisher unit test
  uploading gillepsie jld2 test
  modifying project.toml and unit test
  Adding many unit test files
  added test files, modifying functioning of update_rates. Looks pretty good right now
  no message
  significantly modifying ABMEv_Gillepse

# Conflicts:
#	src/ABMEv_runworld.jl