Features
   * Add support for reading points in compressed format
     (MBEDTLS_ECP_PF_COMPRESSED) with mbedtls_ecp_point_read_binary()
     (and callers) for Short Weierstrass curves with prime p where p = 3 mod 4
     (all mbedtls MBEDTLS_ECP_DP_SECP* and MBEDTLS_ECP_DP_BP* curves
      except MBEDTLS_ECP_DP_SECP224R1 and MBEDTLS_ECP_DP_SECP224K1)