UI update

- UI updated
- Checkpoint added
UI updated

- UI updated
- Checkpoint added
Change testnet foldername from 'testnet3' to 'testnet'
Update icons

 - tx_input.png
 - tx_output.png
 _ tx_inout.png
Update overviewpage.cpp
s/GuldenCoin/guldencoin in makefile.unix
Revert release notes back to "Litecoin"
Set correct genesis block info in comments
Actually display testnet splash image when running testnet.
Remove generated resource file and generated Makefile.
Add DGW3 for testnet
Change protocol magic. Increment version minor. Revert protocol version.
Change testnet magic. Update magic description.
Add comments to DGW3 algorithm.
s/GuldenCoin/Guldencoin for CLIENT_NAME
Update pixmaps
Add DGW diffmode at block 123793
Merge remote-tracking branch 'upstream/master' into fed