update version to 2.2.3

Add a note about installation. Remove the 'supported filetypes' section.

.gitignore

@@ -1,2 +1,3 @@
 *~
 *.swp
+tags

Rakefile

@@ -0,0 +1,76 @@
+# written by travis jeffery <travisjeffery@gmail.com>
+# contributions by scrooloose <github:scrooloose>
+
+require 'rake'
+require 'find'
+require 'pathname'
+
+IGNORE = [/\.gitignore$/, /Rakefile$/]
+
+files = `git ls-files`.split("\n")
+files.reject! { |f| IGNORE.any? { |re| f.match(re) } }
+
+desc 'Zip up the project files'
+task :zip do
+  zip_name = File.basename(File.dirname(__FILE__))
+  zip_name.gsub!(/ /, '_')
+  zip_name = "#{zip_name}.zip"
+
+  if File.exist?(zip_name)
+    abort("Zip file #{zip_name} already exists. Remove it first.")
+  end
+
+  puts "Creating zip file: #{zip_name}"
+  system("zip #{zip_name} #{files.join(" ")}")
+end
+
+desc 'Install plugin and documentation'
+task :install do
+  vimfiles = if ENV['VIMFILES']
+               ENV['VIMFILES']
+             elsif RUBY_PLATFORM =~ /(win|w)32$/
+               File.expand_path("~/vimfiles")
+             else
+               File.expand_path("~/.vim")
+             end
+  files.each do |file|
+    target_file = File.join(vimfiles, file)
+    FileUtils.mkdir_p File.dirname(target_file)
+    FileUtils.cp file, target_file
+
+    puts "Installed #{file} to #{target_file}"
+  end
+
+end
+
+desc 'Pulls from origin'
+task :pull do
+  puts "Updating local repo..."
+  system("cd " << Dir.new(File.dirname(__FILE__)).path << " && git pull")
+end
+
+desc 'Calls pull task and then install task'
+task :update => ['pull', 'install'] do
+  puts "Update of vim script complete."
+end
+
+desc 'Uninstall plugin and documentation'
+task :uninstall do
+  vimfiles = if ENV['VIMFILES']
+               ENV['VIMFILES']
+             elsif RUBY_PLATFORM =~ /(win|w)32$/
+               File.expand_path("~/vimfiles")
+             else
+               File.expand_path("~/.vim")
+             end
+  files.each do |file|
+    target_file = File.join(vimfiles, file)
+    FileUtils.rm target_file
+
+    puts "Uninstalled #{target_file}"
+  end
+
+end
+
+task :default => ['update']
+