New circuits and verification keys update

Changes in interfaces.
Support credentialAtomicQueryMTP and credentialAtomicQuerySig circuits

Add unit tests for atomic circuits

v0.0.12

fix / update unit tests

fix for public signals schema Atomic Query (user identifier)

v0.0.11

fix / update go-circuit dep

fix for public signals schema Atomic Query (user identifier)

v0.0.9

fix / update go-circuit dep

fix for public signals schema Atomic Query (user identifier)

v0.0.8

fix / update go-circuit dep

update go-circuits metadata

v0.0.7

fix / update go-circuit dep

Fixes for protocol messages

v0.0.6

hotfix for json representation

fix for public signals schema Atomic Query (user identifier)

v.0.0.10

fix / update go-circuit dep

support credential fetch request

Merge pull request #5 from iden3/feature/support-fetch-request

Feature/support fetch request

Update verification key for auth circuit

Merge pull request #3 from iden3/fix/update-authentication-key

update verification key for auth circuit