Rename Qt Pro file

Having a specifically names Qr Pro file helps avoid conflicts in some
development environments.
Remove old pnSeeds

These pnSeeds belong to an old network and are not relevant to
Neutrinocoin.
Add makekeypair and sendalert

makekeypair creates ECDSA keys for use in the alert system and auto
checkpointing and sendalert is used to send alerts to the network.
Remove out of date BDB work around

Conflicts:
	src/main.cpp
Reject blocks if 15 mins outside network time

The limit before was 2 hours outside of the network time which is too
great with the faster retarget that Neutrinocoin has. 15 mins
significantly reduces the impact that a time warp attack can have on the
retarget.
Reject all non-V2 blocks

All blocks should be V2 which has nHeight. This explicitly rejects any
blocks that are not V2 or do not have nHeight.
Automatic Checkpointing

Automatically broadcasts checkpoints to prevent 51% attacks reversing
transactions.
New keys for checkpointing
v0.4.0.0