Added license info and docs for how to access result

Author: abbasali

README.md

@@ -31,63 +31,82 @@ Here's how you can access the fixer.io's endpoints:
 ### [Latest rates endpoint](https://fixer.io/documentation#latestrates)
 
 ```php
-$fixerio->latest(
+$latestRates = $fixerio->latest(
     [
         'base' => 'USD', // optional
         'symbols' => 'INR', // optional
     ]
 );
+
+// Display the INR rates
+echo $latestRates['rates']['INR'];
 ```  
 
 ### [Historical rates endpoint](https://fixer.io/documentation#historicalrates)
 
 ```php
-$fixerio->historical(
+$historicalRates = $fixerio->historical(
     [
         'date' => '2019-01-01',
         'base' => 'USD', // optional
         'symbols' => 'INR', //optional
     ]
 );
+
+// Display the INR rates
+echo $latestRates['rates']['INR'];
 ```
 
 ### [Convert endpoint](https://fixer.io/documentation#convertcurrency)
 
 ```php
-$fixerio->convert(
+$convertedRates = $fixerio->convert(
     [
         'from' => 'USD',
         'to' => 'INR',
         'amount' => 50.75,
         'date' => '2019-01-01', //optional
     ]
 );
+
+// Display the converted amount
+echo $convertedRates['result'];
 ```
 
 ### [Time-Series data endpoint](https://fixer.io/documentation#timeseries)
 
 ```php
-$fixerio->timeseries(
+$timeseriesData = $fixerio->timeseries(
     [
         'start_date' => '2019-01-01',
         'end_date' => '2019-01-05',
         'base' => 'USD', // optional
         'symbols' => 'INR', //optional
     ]
 );
+
+// Display the INR rate for 2019-01-02
+echo $timeseriesData['rates']['2019-01-02']['INR'];
 ```
 
 ### [Fluctuation data endpoint](https://fixer.io/documentation#timeseries)
 
 ```php
-$fixerio->fluctuation(
+$fluctuationData = $fixerio->fluctuation(
     [
         'start_date' => '2019-01-01',
         'end_date' => '2019-01-05',
         'base' => 'USD', // optional
         'symbols' => 'INR', //optional
     ]
 );
+
+// Display the change/fluctuation amount of INR between the given date range
+echo $fluctuationData['rates']['INR']['change'];
 ```
 
 The response for all the above calls will be a JSON object. Please refer fixer.io's [documentation](https://fixer.io/documentation) for further details about various endpoints, request parameters and response objects.
+
+## License
+
+This package is open-sourced software licensed under the [MIT license](https://opensource.org/licenses/MIT).