HadesMem v2 Work Has Started

I have finally returned to working on HadesMem, and at long last I am starting work on v2. This means I will hopefully be able to address some of the long-standing requests that require breaking changes to fix. Because of this I recommend you continue to use v1.6.0 until trunk is more stable. For the time being, trunk is going to be a bit of a minefield, but it will be worth it in the end. ;)