README.md in deepl-rb-1.0.1 vs README.md in deepl-rb-2.0.0

@@ -1,10 +1,10 @@
 [![Gem Version](https://badge.fury.io/rb/deepl-rb.svg)](https://badge.fury.io/rb/deepl-rb) [![Dependency Status](https://gemnasium.com/badges/github.com/wikiti/deepl-rb.svg)](https://gemnasium.com/github.com/wikiti/deepl-rb) [![CircleCI](https://circleci.com/gh/wikiti/deepl-rb.svg?style=shield)](https://circleci.com/gh/wikiti/deepl-rb) [![CodeCov](https://codecov.io/gh/wikiti/deepl-rb/branch/master/graph/badge.svg?token=SHLgQNlZ4o)](https://codecov.io/gh/wikiti/deepl-rb)
 
 # DeepL for ruby
 
-A simple ruby wrapper for the [DeepL translation API (v1)](https://www.deepl.com/docs/api-reference.html).
+A simple ruby wrapper for the [DeepL translation API (v1)](https://www.deepl.com/api.html).
 
 ## Installation
 
 Install this gem with
 
@@ -88,16 +88,37 @@
 | `ES`            | Spanish
 | `IT`            | Italian
 | `NL`            | Dutch
 | `PL`            | Polish
 
-You can also use custom query parameters, like `tag_handling`:
+You can also use custom query parameters, like `tag_handling` or `split_sentences`:
 
 ```rb
-translation = DeepL.translate '<p>A sample</p>', 'EN', 'ES', tag_handling: true
+translation = DeepL.translate '<p>A sample</p>', 'EN', 'ES',
+                              tag_handling: 'xml', split_sentences: false
 
 puts translation.text
 # => "<p>Una muestra</p>"
+```
+
+The following parameters will be automatically converted:
+
+| Parameter             | Conversion
+| --------------------- | ---------------
+| `preserve_formatting` | Convertes `false` to `'0'` and `true` to `'1'`
+| `split_sentences`     | Convertes `false` to `'0'` and `true` to `'1'`
+
+### Usage
+
+To check current API usage, use:
+
+```rb
+usage = DeepL.usage
+
+puts usage.character_count
+# => 180118
+puts usage.character_limit
+# => 1250000
 ```
 
 ### Handle exceptions
 
 You can capture and process exceptions that may be raised during API calls. These are all the possible exceptions: