v0.6.7

[askmike]

Minor stability release.

Minor changes:

• [CORE] make sure to flush the candle batcher, fix Error: cb is not a function #2329 (make sure to flush the batcher, fix #2329 #2482 - @askmike)
• [CORE] Add Tulip and Talib Indicator-Results to 'stratUpdate' event (Add Tulip and Talib Indicator-Results to 'stratUpdate' event #2483 - @H256)
• [CORE] Include STDDEV tulip indicator (Include STDDEV in tulind.js #2485 - @H256)
• [GB] fix race condition regarding order cancellation ([GB] make sure we always check pending actions #2496 - @askmike)
• [CORE] Bugfix IPC communication regarding CP eol ([BUGFIX] Fixes IPC disconnected error #2500 - @alexvandervegt)
• [GB] Added ETC pairs to GDAX (Added ETC support for GDAX #2501 - @crypto49er)
• [GB] Kraken stability improvements ([WIP] GB kraken stability #2502, [GB] minimum order size for doge on kraken, fix #2535 #2536 - @askmike)
• [DB] Fixes empty client on postgresql plugin ([BUGFIX] Fixes empty client on postgresql plugin #2504 - @alexvandervegt)
• [CORE] Add market and strat info to a backtest export (export useful info in backtestResultExporter #2509 - @hiyan)
• [CORE] hotfix: dont close the stream until async indicators are done ([hotfix] dont close the stream until async indicators are done #2533 - @askmike)
• [GB] hotfix: fix minimum doge ordersize on GDAX (this.advice is not a function #2539 - @askmike)
• [PLUGIN] Improved pushbullet messaging (Pushbullet Plugin - extended functionality #2549 - @RJPGriffin)
• [DOCS] Added descriptive comments for tulip indicators (Added descriptive comments for tulip indicators #2564 - @botsedge)
• [UI] Fix to importer dates to UTC (Fix to importer dates #2566 - @rkingy)
• [UI] Improve transpiling of shared front/backend code (bugfix #2568 transforms commonjs modules to ES2015 #2573 - @eusorov)
• [STRAT] if no strategy.historySize found, than get it from tradingAdvisor (Method.Update Function Not called with multiple Tulip Indicators #2548 - @eusorov)
• [GB] hotfix: Fixed fee calculations for binance exchange (Fixed getFee() for binance exchange #2578 - @olexiyb)
• [GB] Add new GDAX markets, update minimal trade sizes & make kraken markets dynamic (Update gdax.js #2591, Add support for ZRX on GDAK #2597, 2606 - @g1tt)
• [DOCS] Document current installation situtation & improve folder navigation commands (Common install issue #2599 - @hiyan)
• [REPO] Add stale bot to manage issues (add stale bot config, fix #2127 #2608 - @askmike)