Ec pairing documentation (#68)

* document constant functions

* add documentation

* removeunused functions (#72)

* remove_unnecessary_mod (#71)

* implement suggested optimization (#70)

* remove constant funcitons (#73)

* fix point comparison (#74)

* Fix field order naming (#75)

* fix field order naming

* replace GROUP_ORDER for FIELD_ORDER

* Removes_unnecessary_checking_in_ecMul (#78)

* Add tests for points outside the field (#79)

* improves overflowAdd (#80)

* fix typos

* Removes unnecessary handling of a special case on addition. (#77)

* removes unecesary check

* resolve confilct

* improves_binaryExtendedEuclideanAlgorithm (#81)

* Revert "Merge branch 'ecPairing' into ecPairing_documentation"

This reverts commit 86a6e52, reversing
changes made to 5684c15.

* Fix documentation with no utf8 characters

* Delete unused g2 function

* Add TODO comment

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Co-authored-by: Nacho Avecilla <[email protected]>
Co-authored-by: IAvecilla <[email protected]>
Co-authored-by: Iván Litteri <[email protected]>