* modifying FR lemmatization for nouns
* modifying FR lemmatization for nouns
* adding contributor agreement for amperinet
* adding rules for words with inclusive parentheses wrongly tokenized
* adding contributor agreement for amperinet
* adding a missing comma
* updating rules and vocabulary for French lemmatization of verbs
* updating the file with French auxiliary verb
* updating rules and vocabulary for French lemmatization of verbs
* adding contributor agreement for amperinet
* adding rules for words with inclusive parentheses wrongly tokenized
* additional unit test for new entr word not in other lists
* bugfix - unit test works
* use _latin_lower instead of alpha_lower for french
* revert back to ALPHA_LOWER (following the code for languages)
* contributor agreement
<!--- Provide a general summary of your changes in the title. -->
## Description
<!--- Use this section to describe your changes. If your changes required
testing, include information about the testing environment and the tests you
ran. If your test fixes a bug reported in an issue, don't forget to include the
issue number. If your PR is still a work in progress, that's totally fine – just
include a note to let us know. -->
Add a rule-based French Lemmatizer following the english one and the excellent PR for [greek language optimizations](https://github.com/explosion/spaCy/pull/2558) to adapt the Lemmatizer class.
### Types of change
<!-- What type of change does your PR cover? Is it a bug fix, an enhancement
or new feature, or a change to the documentation? -->
- Lemma dictionary used can be found [here](http://infolingu.univ-mlv.fr/DonneesLinguistiques/Dictionnaires/telechargement.html), I used the XML version.
- Add several files containing exhaustive list of words for each part of speech
- Add some lemma rules
- Add POS that are not checked in the standard Lemmatizer, i.e PRON, DET, ADV and AUX
- Modify the Lemmatizer class to check in lookup table as a last resort if POS not mentionned
- Modify the lemmatize function to check in lookup table as a last resort
- Init files are updated so the model can support all the functionalities mentioned above
- Add words to tokenizer_exceptions_list.py in respect to regex used in tokenizer_exceptions.py
## Checklist
<!--- Before you submit the PR, go over this checklist and make sure you can
tick off all the boxes. [] -> [x] -->
- [X] I have submitted the spaCy Contributor Agreement.
- [X] I ran the tests, and all new and existing tests passed.
- [X] My changes don't require a change to the documentation, or if they do, I've added all required information.
* Add contraction forms of some common stopwords
All the stopwords added contain the apostrophe" ' "or " ’ ".
* Adds contributor agreement mauryaland
* Update mauryaland.md
