Users no longer have to install binding_of_caller manually!

README.md

@@ -21,12 +21,6 @@ group :development do
 end
 ```
 
-If you would like to use Better Errors' **advanced features** (REPL, local/instance variable inspection, pretty stack frame names), you need to add the [`binding_of_caller`](https://github.com/banister/binding_of_caller) gem by [@banisterfiend](http://twitter.com/banisterfiend) to your Gemfile:
-
-```ruby
-gem "binding_of_caller"
-```
-
 This is an optional dependency however, and Better Errors will work without it.
 
 ## Security