Getting Karma by learning about_nil.rb

*In most other languages, nil or NULL is an
 undefined thing, in Ruby, it's actually an object

[#54145725]
Getting Karma by learning about_nil.rb

* If an undefined method is called on nil it,
 will raise a NoMethodError with a message 
 stating that that method is not found.

 * Everyone else doesn't know it yet, but this is
 the most common error in Rails 

[#54145725]
Getting Karma by learning about_nil.rb

* The nil object has some methods defined on it.

[#54145725]
Merge pull request #2 from kellihsf/54145727_about_nil_master

about nil master

[Delivers #54145727]