[Story] Config and Experiment Management - MVP about morty HOT 1 CLOSED

It's time to review what I have done so far from this story and move the rest to separate tickets:

• based our configs on python dictionaries specified as separate files/modules ✅
• access nested values in the easy and readable way ✅
• change different moving parts of the experiment (e.g. loss functions, optimisers, LR schedulers, feature extractors, architectures or parts of them) ✅
• load secrets from a place that is not under version control, so all env variables could be safety stored separately and loaded along with other configs - moved to #18
• track entire script output ✅
• backup hyperparams ✅
• GIT commit hash of the project ✅
• GIT diff patch ✅
• ability to backup specific files - moved to #19
• ability to dump and save any artifacts ✅
• DVC provides a simple way to plot some kind of information and we could use the system compatible with their plotting functionality - needs investigation #20

from morty.