Feature: Add mock testing to ZB (#569)

* Adds mock testing to ZB

* STEALS improved time validation code from the original STOLEN validation code :D

* Mini fixes from review

* happy fun comment stealing

* Moves the loop checker earlier to ensure no double appendages

* Fixes sneaky test

* Fixes the important part where mock tests work instead of live tests

* Skips authenticated endpoints for mock testing.

* lint

* Updates candle wrapper functions to respect design

* basic linting fix

* Reverts configtest.json, updates readme to be way better, adds coverage to validateCandlesRequest

* Tiniest grammatical fix

* Fixes more outdated code references

* Closing out a high

* Fixes spacing

* Replaces all instances of 4 spaces in tmpl files with a tab

* fixes spacing and tab related readme issues once and for all 🤞

* tidy

* indentation violation identification situation

exchanges/orderbook/README.md

@@ -22,9 +22,9 @@ Join our slack to discuss all things related to GoCryptoTrader! [GoCryptoTrader
 
 + This package facilitates orderbook generation.
 + Attaches methods to an orderbook
-  - To Return total Bids
-  - To Return total Asks
-  - Update orderbooks
+	- To Return total Bids
+	- To Return total Asks
+	- Update orderbooks
 + Gets a loaded orderbook by exchange, asset type and currency pair.
 
 + This package is primarily used in conjunction with but not limited to the
@@ -36,7 +36,7 @@ Examples below:
 ```go
 ob, err := yobitExchange.FetchOrderbook()
 if err != nil {
-  // Handle error
+	// Handle error
 }
 
 // Find total asks which also returns total orderbook value
@@ -49,7 +49,7 @@ the package itself.
 ```go
 ob, err := orderbook.Get(...)
 if err != nil {
-  // Handle error
+	// Handle error
 }
 ```