v2.0:

- Added Stratum support for Decred.
- Added "-esm 2" option for "miner-proxy" Stratum version - for such pools like coinotron, coinmine, etc.
- Default "-dbg" value is "0" now, log file is created by default. You can disable it with "-dbg -1" option.
- If GPU thread hangs and its speed is not updated, miner shows zero speed for that card.
- Added "-wd" option.
- Added "-r" option.
- Additional checks related to DAG files: checking disc space, removing invalid DAG files.
- Bug fixes.