Update to GCT script library (#496)

* * Adds script link to GCT logger package
* Adds ability to save data as csv via script

* addr nits

* go mod tidy

* add glorious suggestion

* rm unused function

* fix linter issues

* clean up some issues

* Add in configuration fields to object for reflection to the csv file

* RM line :D

* address nits

* update to check for target already being set and add more test coverage

* force usage of .csv file extention && append date to client filename as to not overwrite file if collision occurs

* fix whoopsie

* linter issues

* purge getter methods

* Added glorious suggestion

* go mod tidy after merge

* niterinos

gctscript/examples/csv.gct

@@ -0,0 +1,28 @@
+exch := import("exchange")
+t := import("times")
+// Import all the indicators you want
+atr := import("indicator/atr")
+sma := import("indicator/sma")
+ema := import("indicator/ema")
+common := import("common")
+
+load := func() {
+    // define your start and end within reason.
+    start := t.date(2017, 8 , 17, 0 , 0 , 0, 0)
+    end := t.add_date(start, 0, 6 , 0)
+
+    // This fetches the ohlcv 
+    ohlcvData := exch.ohlcv("binance", "BTC-USDT", "-", "SPOT", start, end, "1d")
+
+    // construct ta values 
+    avgtr := atr.calculate(ohlcvData.candles, 14)
+    simma := sma.calculate(ohlcvData.candles, 9)
+    expma := ema.calculate(ohlcvData.candles, 9)
+    
+    // 'ctx' is already defined when we construct our bytecode from file. 
+    // It contains script ID and shortname of file as save details to default
+    // script output directory.
+    common.writeascsv(ctx, ohlcvData, avgtr, simma, expma)
+}
+
+load()