Netcoin v1.2.0

Moving to new repo, updated with new checkpoints and kimoto gravity well
starting at block 235000
Netcoin v1.2.0

Updated alert keys and changed KGW to take effect at block 218500
Netcoin v1.2.0

Added compiled binaries
Initial POW/POS netcoin blockchain loader
Netcoin POW/POS blockchain loader
Added LevelDB makefile
Added Testnet Parameters
Added DigiShield to become active on the same block as POS. Tidied up
the difficulty function selection logic.
Allow testnet solo mining with no sync
Removed pandacoin specific block chain validation check
Changed default BLOCK version to 3.

POW blocks MUST always be version 2 or less to be accepted in netcoin
1.2 wallets.  POS blocks must be version 3 or higher to enable serialize
logic to handle their extra fields. POS blocks are a hard fork from 1.2
wallets.
Fix mining: need to use GetPoWHash function for POW block work
validation
Make fails. use chmod +x src/leveldb/build_detect_platform
fur coat
fur coat
fur coat
Merge pull request #2 from regtable/master

skinning panda
Used correct format types to remove printf warnings and fixed some
unused variable warnings.
Remove <leveldb> include
Remove unused leveldb reference