Implemented add, mult, inv, sub, div, pow and neg for binary fields and wrote tests for each function #3113

Job	Run time
Check no_std	32s
List directories for parallelizing tests	4s
Check Documentation	1m 3s
Check (stable)	12s
Check (nightly)	1m 7s
Check Style	10s
Test (stable)	9m 5s
Test assembly	8m 25s
Test (nightly)	17m 25s
Test (cp6_782/)	8s
Test (mnt4_753/)	18s
Test (mnt6_753/)	10s
Test (./ed_on_mnt4_753)	3m 55s
Test (./secp256r1)	1m 12s
Test (./ed_on_mnt4_298)	1m 9s
Test (./ed_on_cp6_782)	1m 26s
Test (./mnt4_298)	3m 54s
Test (./mnt6_298)	5m 25s
Test (./ed_on_bn254)	1m 10s
Test (./bn254)	2m 29s
Test (./secp256k1)	1m 42s
Test (./bw6_761)	3m 58s
Test (./bls12_377)	4m 15s
Test (./grumpkin)	1m 22s
Test (./secp384r1)	1m 33s
Test (./ed_on_bls12_377)	1m 16s
Test (./secq256k1)	1m 8s
Test (./ed25519)	1m 12s
Test (./ed_on_bls12_381)	1m 23s
Test (./ed_on_bw6_761)	40s
Test (./curve25519)	1m 22s
Test (./ed_on_bls12_381_bandersnatch)	1m 2s
Test (./pallas)	1m 13s
Test (./vesta)	1m 13s
Test (./bw6_767)	4m 10s
Test (./bls12_381)	3m 27s
	1h 30m 15s

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