Box.md

+Box original implementation. Provides an easy interface to manipulate, save and restore, box-like values from the database. Works very similar to the `ActiveRecord::Point`, but for a list of 2 points each one with an `x` and `y` value. [PostgreSQL Docs](https://www.postgresql.org/docs/9.6/datatype-geometric.html#AEN7119)
+
+# How it works
+
+### Migration
+
+Just set the type of the column as `box` when creating a table.
+```ruby
+create_table "region" do |t|
+  t.string "title", null: false
+  t.box    "area"
+end
+```
+
+### Using it
+
+The column is automatically identified and its value turned into what is set on [`geometry.box_class`](https://github.com/crashtech/torque-postgresql/wiki/Configuring#geometry.box_class) or into a `Torque::PostgreSQL::Box`. 
+
+This original implementation provides a couple of methods:
+```ruby
+region = Region.new
+region.area.x1
+region.area.y1
+region.area.x2
+region.area.y2
+region.area.points   # Which will return the 4 points of the box
+```
+
+The value can be set in some different manners:
+
+```ruby
+region.area = '1,1,10,10'
+region.area = '[1,1],[10,10]'
+region.area = '((1,1),(10,10))'
+region.area = [1,1,10,10]
+region.area = [[1,1],[10,10]]
+region.area = { x1: 1, y1: 1, x2: 10, y2: 10 }
+```
\ No newline at end of file