merging new build scripts for darwin, ubuntu, fedora and red hat (on hold for now)

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

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