Master bta 1307

Fix proxy contract for new eosio.system account

DAWN-512 - Improve eosioc error message

initalize sbrk_bytes based on initial memory size of wasm memory

Added commas to make genesis.json valid JSON

adding exception::top_message back since for now there is no other way to get not decorated assert message

Add more constraints on WASM execution environment

Fix chaintest

add more crypto apis to wasm interface

add parameter for tester construction to indicate whether it should push the genesis/funding transactions.  Setting this to false creates a testr that can be fed those transactions in a block.

Add automake dependency to install_dependencie.sh

Rename installed scripts and binaries with eosio- prefix

add i64xi64 index that behaves like i128x128 index

Update cmakelist to require wasm now that system.contract is mandatory