add io/* to load path

Author: geographist

lib/geoscript.rb

@@ -12,6 +12,7 @@
 
   require 'geoscript/version'
   require 'geoscript/util'
+  require 'geoscript/io'
   require 'geoscript/projection'
   require 'geoscript/geom'
   require 'geoscript/feature'

lib/geoscript/io.rb

@@ -0,0 +1,4 @@
+require 'io/geom/json'
+require 'io/geom/wkb'
+require 'io/geom/wkt'
+require 'io/feature/json'