Minor updates to docs (#1236)

Author: MaicolBen

README.md

@@ -65,6 +65,8 @@ Please read the [issue template](https://github.com/lynndylanhurley/devise_token
 
 See our [Contribution Guidelines](https://github.com/lynndylanhurley/devise_token_auth/blob/master/.github/CONTRIBUTING.md). Feel free to submit pull requests, review pull requests, or review open issues. If you'd like to get in contact, [Zach Feldman](https://github.com/zachfeldman) has been wrangling this effort, you can reach him with his name @gmail. Further discussion of this in [this issue](https://github.com/lynndylanhurley/devise_token_auth/issues/969).
 
+We have some bounties for some issues, [check them out](https://github.com/lynndylanhurley/devise_token_auth/issues?q=is%3Aopen+is%3Aissue+label%3Abounty)!
+
 ## Live Demos
 
 [Here is a demo](http://ng-token-auth-demo.herokuapp.com/) of this app running with the [ng-token-auth](https://github.com/lynndylanhurley/ng-token-auth) module and [AngularJS](https://github.com/angular/angular.js).

docs/faq.md

@@ -1,5 +1,9 @@
 ## FAQ
 
+### I have missing headers or issues with batch requests
+
+Try disabling `change_headers_on_each_request`, it's a nice to have security enhancement but not crucial. If you are curious, you can check how we [manage the tokens and batch requests](docs/conceptual.md)
+
 ### Can I use this gem alongside standard Devise?
 
 Yes! But you will need to enable the support of separate routes for standard Devise. So do something like this:

docs/usage/controller_methods.md

@@ -27,6 +27,7 @@ This gem provides access to all of the following [devise helpers](https://github
 | **`current_user`** | Returns the currently signed-in `User`, or `nil` if unavailable. |
 | **`user_signed_in?`** | Returns `true` if a `User` is signed in, otherwise `false`. |
 | **`devise_token_auth_group`** | Operate on multiple user classes as a group. [Read more](#group-access) |
+| **`update_auth_header`** | After action that updates the header with the new token, it's included by default, you should skip it if you are destroying the user |
 
 Note that if the model that you're trying to access isn't called `User`, the helper method names will change. For example, if the user model is called `Admin`, the methods would look like this: