Support Pattern-matching assembly

[fubuloubu]

For example, if we would want to detect that a particular code was an EIP-1167 proxy, it would be helpful to do a regex against the disassembled code with a wildcard in it:

^
CALLDATASIZE
RETURNDATASIZE
RETURNDATASIZE
CALLDATASIZE
RETURNDATASIZE
RETURNDATASIZE
RETURNDATASIZE
CALLDATASIZE
RETURNDATASIZE
PUSH20 * <--- wildcard here
GAS
DELEGATECALL
RETURNDATASIZE
DUP3
DUP1
RETURNDATACOPY
SWAP1
RETURNDATASIZE
SWAP2
PUSH1 0x2b
JUMPI
REVERT
JUMPDEST
RETURN
$

Could also do other types of checks like finding if a contact's code contains a particular address:

PUSH20 {address}