fixed name, added to readme

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    bitarray (0.0.4)
+    bitarray (0.0.5)
 
 GEM
   remote: http://rubygems.org/

README.md

@@ -1,3 +1,34 @@
 # BitArray: A fast(ish), pure Ruby bit field "type"
 
-This is a simple rubygem wrapper for the class written by Peter Cooper and posted to dzone.
+This is a simple rubygem wrapper for the class written by Peter Cooper and posted to dzone.
+
+## History
+v5 (added support for flags being on by default, instead of off)
+#              v4 (fixed bug where setting 0 bits to 0 caused a set to 1)
+#              v3 (supports dynamic bitwidths for array elements.. now doing 32 bit widths default)
+#              v2 (now uses 1 << y, rather than 2 ** y .. it's 21.8 times faster!)
+#              v1 (first release)
+#
+# Description
+Basic, pure Ruby bit array. Pretty fast (for what it is) and memory efficient.
+Works well for Bloom filters (the reason I wrote it).
+
+Create a bit array 1000 bits wide
+```ruby  ba = BitArray.new(1000)```
+
+Setting and reading bits
+```ruby
+  ba[100] = 1
+  ba[100]    .. => 1
+  ba[100] = 0
+```
+
+More
+```ruby
+  ba = BitArray.new(20)
+  [1,3,5,9,11,13,15].each { |i| ba[i] = 1 }
+  ba.to_s
+  #=> "01010100010101010000"
+  ba.total_set
+  #=> 7
+```

bitarray.gemspec

@@ -1,6 +1,6 @@
 # -*- encoding: utf-8 -*-
 $:.push File.expand_path("../lib", __FILE__)
-require "bit_array"
+require "bitarray"
 
 Gem::Specification.new do |s|
   s.name = "bitarray"