GitLab

* upgraded tree visualization, upgraded gif creation, removed graphviz

* fix

* added callback logic, optimized history storage by replacing Chain with ChainTemplate

* added tests for gp_opt_histor and visualisation utils functions, added example for visualisation, fixed tests, added edits from comments to PR

* pep8 edits

* removed hyperparams file, set default callback function, small changes

* rebase on master, small fixes

* refactored composing history class
Co-authored-by: magleb <maximovglebigorevich@gmail.com>