Checkpoint Server

This new version enables centralised checkpoint server.

Easy sync

Included checkpoints for easy syncing.

v12

This version fixes a couple of code errors in the source of v1.

It will reject connections to previous client, and integrates a fork at block 1150.

The daemon name has been changed from Compoundd to compoundd, whilst the data directory and confirmation file maintain previous naming
ie .Compound and Compound.conf