Data/model storage. Fix piskvorky#1453 (piskvorky#1705)

* added download and catalogue functions

* added link and info

* modeified link and info functions

* Updated download function

* Added logging

* Added load function

* Removed unused imports

* added check for installed models

* updated download function

* Improved help for terminal

* load returns model path

* added jupyter notebook and merged code

* alternate names for load

* corrected formatting

* added checksum after download

* refactored code

* removed log file code

* added progressbar

* fixed pep8

* added tests

* added download for >2gb data

* add test for multipart

* fixed pep8

* remove tar.gz, use only .gz for all

* fix codestyle/docstrings[1]

* add module docstring

* add downloader to apiref

* Fix CLI + more documentation

* documentation for load

* renaming

* fix tests

* fix tests[2]

* add test for info

* reduce logging

* Add return_path=True example to docstring

* fix

* update & rename notebook

* Fix docstring + use ValueError when name is incorrect

* move list to global var