Update README.md

Gemfile

@@ -2,8 +2,8 @@ source "https://rubygems.org"
 
 gem "coveralls", require: false
 
-require "pry"
-Pry.start
+# require "pry"
+# Pry.start
 
 # Specify your gem's dependencies in gerencianet.gemspec
 gemspec

README.md

@@ -8,7 +8,9 @@ provided by [Gerencianet](http://gerencianet.com.br).
 [![Code Climate](https://codeclimate.com/github/gerencianet/gn-api-sdk-ruby/badges/gpa.svg)](https://codeclimate.com/github/gerencianet/gn-api-sdk-ruby)
 
 :warning: **Gerencianet API is under BETA version, meaning that it's not available for all users right now. If you're interested, you can always send an email to
-[email protected] and we'll enable it for your account**
+[email protected] and we'll enable it for your account**
+
+## Installation
 
 Add this line to your application's Gemfile:
 
@@ -27,10 +29,90 @@ Or install it yourself as:
 $ gem install gerencianet
 ```
 
+## Basic usage
+
+```ruby
+require "gerencianet"
+
+options = {
+  client_id: "client_id",
+  client_secret: "client_secret",
+  sandbox: true
+}
+
+gerencianet = Gerencianet.new(@options)
+
+input = {
+  items: [{
+    name: "Product A",
+    value: 1000,
+    amount: 2
+  }]
+}
+
+response = gerencianet.create_charge(input)
+```
+
+## Tests
+
+To run the tests, just run *rspec*:
+
+```bash
+$ rspec
+```
+
+Or use *guard* to watch files and automatically run *rspec*
+
+```bash
+$ guard -n false -c
+```
+
+## Additional documentation
+
+### Charges
+
+- [Creating charges](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/docs/charges.md)
+- [Paying a charge](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/docs/charge-payment.md)
+- [Detailing charges](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/docs/charge-detailing.md)
+- [Updating informations](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/docs/charge-update.md)
+
+### Carnets
+
+- [Creating carnets](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/docs/carnets.md)
+- [Detailing carnets](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/docs/carnet-detailing.md)
+- [Updating informations](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/docs/carnet-update.md)
+
+### Subscriptions
+
+- [Creating subscriptions](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/docs/subscriptions.md)
+- [Paying a subscription](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/docs/subscription-payment.md)
+- [Detailing subscriptions](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/docs/subscription-detailing.md)
+- [Updating informations](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/docs/subscription-update.md)
+
+### Marketplace
+
+- [Creating a marketplace](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/docs/charge-with-marketplace.md)
+
+### Notifications
+
+- [Getting notifications](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/docs/notifications.md)
+
+### Payments
+
+- [Getting installments](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/docs/installments.md)
+
+### All in one
+
+- [Usage](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/docs/all-in-one.md)
+
+## Changelog
+
+[CHANGELOG](https://github.com/gerencianet/gn-api-sdk-ruby/tree/master/CHANGELOG.md)
+
 ## Contributing
 
 Bug reports and pull requests are welcome on GitHub at https://github.com/gerencianet/gn-api-sdk-ruby. This project is intended to be a safe, welcoming space for collaboration.
 
 ## License
 
-The gem is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).
+The gem is available as open source under the terms of the [MIT License](LICENSE).