[ABW]: [Fix] Added is_treasury() routine to be used in places where both old and new treasury accounts should be treated specially
[NIP] Added STEEM_DAO_RENAME hardfork indicator - currently set for HF24 - used where distinction between old and new treasury is needed (we can easily move it to future hf this way)
[NIP] Added code for moving funds from old to new treasury - used automatically on every block plus when hardfork is applied (runs empty when hf not active)
[NIP] Added tests for places affected by the fix as well as moving funds