Small change in README

Update demo notebook + put guard-rails for lcia method argument.

Update links to Zenodo of trade database.

Add methodology.md file + getting everything ready for v1.2 release.

Change description of global production market and rename them to glo…

…bal export market after comments from the reviewers.

Correct mistake in some crops irrigation technosphere inputs, worngly…

… regionalized. Also change from the term biosphere_regionalized to biosphere_spatialized which is the correct terminology.

RoW elementary flows were missing because of the IW+ v2.0.1 in some i…

…mpact categories.

Small corrections in mapping of land regionalized flows.

Working with the new format of the UN COMTRADE data + created water t…

…echnosphere processes are now regionalized as well (electricity, heat and waste)

Update demo for v1.0.1