Testnet3 - 1.0.19

We've implemented transaction cold-signing process for simplewallet (CLI + RPC).
This is an important feature for modern services like exchanges because it allows signing a transaction using the offline cold wallet in a secure environment.
Also, this build has quite a few minor improvements and fixes.

Other changes:

simplewallet (CLI):

• implemented offline and watch-only modes required for cold-signing
• new commands: list_outputs, get_tx_key, save_watch_only, sign_transfer, submit_transfer

bugfixes and improvements:

• miniupnpc updated to 2.1 (thanks to anonimal)
• timestamp trap fixed for machines with wrong clock
• transaction pool handles txs with "future" receive time correctly
• help usage format fixed for simplewallet and zanod

Windows binaries:

http://build.zano.org:8081/builds/zano-win-x64-v1.0.19[558e06b]-installer.exe
ZIP: http://build.zano.org:8081/builds/zano-win-x64-v1.0.19[558e06b].zip
PDBs: http://build.zano.org:8081/builds/zano-win-x64-v1.0.19[558e06b]_pdbs.zip

Linux binaries:

http://build.zano.org:8081/builds/zano-linux-x64-v1.0.19[558e06b].tar.bz2

macOS build:

http://build.zano.org:8081/builds/zano-macos-x64-v1.0.19[558e06b].dmg

For mining you can use third-party miners (progminer_cpu.zip attached to this release and for GPU links below), which can also be built from sources: https://github.com/hyle-team/progminer

GPU Binaries:

http://build.zano.org:8081/sowle/progminer-zano-cuda.exe

http://build.zano.org:8081/sowle/progminer-zano-opencl.exe

http://build.zano.org:8081/sowle/progminer-zano-cpu.exe
Guide for using build-in stratum: https://github.com/hyle-team/docs/blob/master/zano/zano_stratum.md