Redirect documentation to Core.md

doc/language/README.md

@@ -1,101 +1,9 @@
-# Features
+# Language
 
 mruby is an implementation of the Ruby programming language.
 These documents are describing the language features and libraries
 which are provided together with mruby.
 
-## Core Classes and Modules
+## Built-In Class and Modules
 
-### Array
-
-The class Array is an implementation of the Array data type in Ruby
-
-[Wikipedia - Array data type](http://en.wikipedia.org/wiki/Array_data_type)
-> In computer science, an array type is a data type that is meant to describe
-> a collection of elements (values or variables), each selected by one or
-> more indices (identifying keys) that can be computed at run time by the
-> program.
-
-#### Methods
-
-##### *
-
-##### +
-
-##### <<
-
-##### []
-
-##### []=
-
-##### clear
-
-##### concat
-
-##### delete_at
-
-##### empty?
-
-##### first
-
-##### index
-
-##### initialize_copy
-
-##### join
-
-##### last
-
-##### length
-
-##### pop
-
-##### push
-
-##### replace
-
-##### reverse
-
-##### reverse!
-
-##### rindex
-
-##### shift
-
-##### size
-
-##### slice
-
-##### unshift
-
-##### inspect
-
-##### to_s
-
-##### ==
-
-##### eql?
-
-##### <=>
-
-### Class
-
-### Comparable
-
-### Enumerable
-
-### Hash
-
-### Numeric
-
-### Object
-
-### Proc
-
-### Range
-
-### String
-
-### Symbol
-
-## Standard Library
+see *doc/lang/Core.md*