add exception relative requirement to httpmanager

fix typo in estimate withdraw fee

fix typo in method get estimate withdraw fee

updates the documentation link

Author: Insmael

README.md

@@ -10,9 +10,7 @@ To install Cryptomarket use gem
 gem install cryptomarket-sdk
 ```
 # Documentation
-
-[The api documentation](https://api.exchange.cryptomkt.com/)
-
+This sdk makes use of the [api version 2](https://api.exchange.cryptomkt.com/v2) of cryptomarket
 
 # Quick Start
 

lib/cryptomarket/HttpManager.rb

@@ -3,6 +3,7 @@
 require 'json'
 require 'base64'
 require 'rest-client'
+require_relative 'exceptions'
 
 module Cryptomarket
     class HttpManager

lib/cryptomarket/client.rb

@@ -630,8 +630,8 @@ def rollbackWithdrawCrypto(id)
         # +String+ +currency+:: the currency code for withdraw
         # +Integer+ +amount+:: the expected withdraw amount
 
-        def getEstimatesWithdrawFee(currency, amount)
-            params = {currency:currency, amount:amount}
+        def getEstimateWithdrawFee(currency, amount)
+            params = {amount:amount, currency:currency}
             return get('account/crypto/estimate-withdraw', params)
         end
 

tests/rest/accountManagement.rb

@@ -47,7 +47,7 @@ def test_transfer_convert
     end
 
     def test_get_estimate_withdraw_fee
-        result = @client.getEstimatesWithdrawFee "EOS", "100"
+        result = @client.getEstimateWithdrawFee "EOS", "100"
         # puts result
     end