Tools to convert Ethereum Assembly to EVM Bytecode

Notes:

1. If-then-else branch not yet supported
2. JUMPDEST needs an operand (label). I think there is a bug where the compilation is still successful while producing invalid bytecode when there is JUMPDEST without operand. I'll probably take a look into that once I'm done with other things.
3. PUSHxx will automatically be automatically chosen to required bytes to represent operand
4. Init not included. I still haven't decided whether to design this as an inline assembly support for Solidity compiler or as a standalone compiler. To get init code just add 61xxxx80600D6000396000f300 to the beginning of .binary file where xxxx is the output (number of bytes written in hex) from ethasm (make sure it is 0 padded if the number less than 4 digits. If it is more you will probably need to change the first byte into 62 or something depending on how many bytes required)