Hardfork in devnet and simnet after the difficulty adjustment window

Merge pull request #14 from karlsen-network/mainnet_karlsenhashv2

Testnet karlsenhashv2

Merge pull request #12 from karlsen-network/mainnet_karlsenhashv2

Mainnet karlsenhashv2

fix wasm state

code cleanup

Added the missing .gitignore files and added executable flags