fxfactorial
source emoji from unicode.org html file; add emoji category
This PR makes the code to generate emoji.ml parse html files from unicode.org: http://www.unicode.org/emoji/charts/full-emoji-list.html and https://www.unicode.org/emoji/charts/full-emoji-modifiers.html It has all emojis according to https://www.unicode.org/emoji/charts/emoji-counts.html It add diacritics fixes. It add (sub)categories! It add tests, and various changes, update readme.md
It conflict with the lasts two commits since those changes are based on before @favonia change to gencode.ml but the only real conflict is how diacritics are handled. In this PR we only use '_' to replace diacritics to stay consistent and stay as close as possible to the official names.
For diacritics handling, you may want to use sanette/ubase. It may not fix everything (I see you had to replace 1st to have an OCaml valid identifier) but it should help in some cases.
