* initial commit of poseidon bn128

* got challenger working

* deserialize is working

* cleaned up deserialization function a bit

* fixed challenger

* add in the hack to the challenges

* fixed some bugs in poseidon_bn128

* fri verification is working

* some changes for benchmarking

* added decode_block plonky2 data

* initial commit for poseidon_mds_gate

* updated gate test cases

* working poseidon mds gate

* full verifier test case working

* removed unused file

* change field import

* change import of field package

* changed field import

* moved hash to poseidon and some changes to the field package

* changed file structure

* consolidated gate tests

* added recursive step circuit info

* added all the test cases for the recursive step gates

* initial version of base_sum_gate

* add recursive circuit benchmark files

* added step circuit data and contant gate test

* moved step testing data into gate_testing_utils

* added test case for basesum gate

* added test for arithmetic_gate

* pretty print fibonacci data files

* added in new dummy proof serialized data

* updated powresponse calculation in the challenger chip

* changes to reflect these plonky2 changes:  40aecc8e95

* modified benchmark to accept circuit name