Revert "Revert "Add POS Cutoff Block""
Revert "Revert "Add POS Cutoff Block""

This reverts commit 8323619d52af562b1f6ffb539ff7b0cf1e9164cc.

coinkeeper/2015-06-22_19-13_whitecoin,coinkeeper/2015-06-22_19-13_whitecoin,coinkeeper/2015-06-22_19-13_whitecoin,coinkeeper/2015-06-22_19-13_whitecoin