Improve English in docs.

docs/whats_wrong_with_other_gems.md

@@ -2,27 +2,27 @@
 
 ### What's wrong with other gems?
 
-Just look at [Ruby-Toolbox](https://www.ruby-toolbox.com/categories/rails_comments). What we can see?
+Take a look at [Ruby-Toolbox](https://www.ruby-toolbox.com/categories/rails_comments). What can we see?
 
-* [Acts as commentable with threading](https://github.com/elight/acts_as_commentable_with_threading) - so, guys, where is the render helper for the tree? There is no helper! Should  I make render helper for tree by myself? Nooooo!!! I'm so sorry, but I can't use this gem. 
-* [acts_as_commentable](https://github.com/jackdempsey/acts_as_commentable) - so, I can see code for models. But I can't see code for controllers and views. Unfortunately, there is no threading. It's not enough for me.
-* [opinio](https://github.com/Draiken/opinio) - looks better, but there is no threading. I want to have more!
-* [has_threaded_comments](https://github.com/aarongough/has_threaded_comments) - Nice work! Nice gem! Models, controllers, views, view helper for tree rendering! **But**, last activity 2 years ago, I need few features, I think - I can make it better.
+* [Acts as commentable with threading](https://github.com/elight/acts_as_commentable_with_threading) - Where is the render helper for the tree? There is no helper! Am I supposed to write a render helper for the tree myself? Nooooo!!! I'm sorry, I can't use this gem. 
+* [acts_as_commentable](https://github.com/jackdempsey/acts_as_commentable) - I can see the code for models. But I can't see the code for controllers and views. Unfortunately, there is no threading. This isn't enough for me.
+* [opinio](https://github.com/Draiken/opinio) - Better, but still no threading. I can do better!
+* [has_threaded_comments](https://github.com/aarongough/has_threaded_comments) - A solid gem. Has model, controller and view helpers for tree rendering! **But** last activity was 2 years ago, it still needs a few features - I can do better.
 
-### Why TheComments is better than others gems?
+### Why is TheComments better than other gems?
 
 1. TheComments allows for threaded comments
 2. **Only TheComments has special helper for tree rendering** (based on [TheSortableTree](https://github.com/the-teacher/the_sortable_tree)).
-3. TheComments designed to reduce requests to database. I say about useful cache counters.
-4. TheComments has solution for [building of Recent Comments](https://github.com/the-teacher/the_comments/blob/master/docs/denormalization_and_recent_comments.md) (for polymorphic relations)
-5. TheComments designed for text preprocessors (Textile, Markdown, Sanitize, Coderay etc.)
-6. TheComments has admin UI based on bootstrap 3
-7. TheComments is "all-in-one" solutions.<br>
+3. TheComments is designed to reduce database requests. Helpful for cache counters.
+4. TheComments has a solution for [building Recent Comments](https://github.com/the-teacher/the_comments/blob/master/docs/denormalization_and_recent_comments.md) (for polymorphic relations)
+5. TheComments is designed for text preprocessors (Textile, Markdown, Sanitize, Coderay etc.)
+6. TheComments has an admin UI based on bootstrap 3
+7. TheComments is an "all-in-one" solution.<br>
    It has: Models and Controllers logic (via concerns), Generators, Views, Helper for fast Tree rendering and Admin UI.
-8. I'll try to help you via skype: **ilya.killich**, if you have problems with TheComments
+8. If you have problems with TheComments, I'll try to help you via skype: **ilya.killich**
 
 ### TheComments based on:
 
 1. [AwesomeNestedSet](https://github.com/collectiveidea/awesome_nested_set) - for comments threading
 2. [TheSortableTree](https://github.com/the-teacher/the_sortable_tree) - for fast rendering of comments tree
-3. [State Machine](https://github.com/pluginaweek/state_machine) - to provide easy and correct recalculation cache counters on states transitions
+3. [State Machine](https://github.com/pluginaweek/state_machine) - to provide easy and correct recalculation cache counters on states transitions

docs/where_is_example_application.md

@@ -2,11 +2,11 @@
 
 ### Dummy Application
 
-Repo of TheComments has dummy application for developmet and testing.
+TheComments repository contains a dummy application for development and testing.
 
 It's here: [Dummy App](https://github.com/the-teacher/the_comments/tree/master/spec/dummy_app)
 
-For run dummy app, your should do that:
+To run the dummy app:
 
 ```ruby
 git clone https://github.com/the-teacher/the_comments.git
@@ -22,7 +22,7 @@ rails s -p 3000 -b localhost
 
 ### Run tests
 
-Following instructions should helps to run simple tests:
+To run the RSPEC tests:
 
 ```ruby
 git clone https://github.com/the-teacher/the_comments.git