docs: add note about 0.3.0.beta1

Author: palkan

README.md

@@ -22,6 +22,9 @@ Add this line to your application's `Gemfile`:
 
 ```ruby
 gem "action_policy"
+# or start from the new version,
+# which is coming soon (it contains much more useful features)
+gem "action_policy", "0.3.0.beta1"
 ```
 
 And then execute:

docs/README.md

@@ -5,6 +5,8 @@
 
 > Action Policy is an authorization framework for Ruby and Rails applications.
 
+**NOTE:** this documentation covers the _coming-soon_ version "0.3.0" ([first beta](https://rubygems.org/gems/action_policy) is out!).
+
 ## What is it?
 
 _Authorization_ is an act of giving **someone** official

docs/reasons.md

@@ -55,13 +55,6 @@ p ex.result.reasons.details #=> { stage: [:show?] }
 
 ## Detailed Reasons
 
-**NOTE:** this feature hasn't been released yet and planned for 0.3.0 release.
-You can use it now by installing the gem from GitHub master:
-
-```ruby
-gem "action_policy", github: "palkan/action_policy"
-```
-
 You can provide additional details to your failure reasons by using a `details: { ... }` option:
 
 ```ruby

docs/scoping.md

@@ -1,12 +1,5 @@
 # Scoping
 
-**NOTE:** this feature hasn't been released yet and planned for 0.3.0 release.
-You can use it now by installing the gem from GitHub master:
-
-```ruby
-gem "action_policy", github: "palkan/action_policy"
-```
-
 By _scoping_ we mean an ability to use policies to _scope data_ (or _filter/modify/transform/choose-your-verb_).
 
 The most common situation is when you want to _scope_ ActiveRecord relations depending