title: gem install mechanize causing libxml errors(windows 7)
body: <p>Here is the cropped error when I tried the command '<em>gem install mechanize</em>'</p>
  
  <pre><code>Building native extensions.  This could take a while...
  C:/Ruby/bin/ruby.exe extconf.rb
  checking for libxml/parser.h... no
  -----
  libxml2 is missing.  please visit http://nokogiri.org/tutorials/installing_nokog
  iri.html for help with installing dependencies.
  -----
   extconf.rb failed 
  Could not create Makefile due to some reason, probably lack of necessary
  libraries and/or headers.  Check the mkmf.log file for more details.  You may
  need configuration options.
  </code></pre>
  
  <p>then I tried to install the libxml using '<em>gem install libxml</em>' and it returns following error</p>
  
  <pre><code>ERROR:  Possible alternatives: eimxml, eim_xml, irxml, libacl, libowl
  </code></pre>
  
  <p>It will be better if there is any EXE or precompiled installer that can install the mechanize with all the dependencies.</p>
  
  <p>I am using Windows7(64 bit) and, ruby 2.0.0p247 (2013-06-27) [x64-mingw32]</p>