title: Converting ant_rules_r3 builds to new SDK main_rules
body: <p>Trying to convert an existing Android build system using Ant with 'ant_rules_r3.xml' integration from the older SDK to the newer SDK 'main_rules.xml' setup.  We have some custom SVN tasks patched into the 'ant_rules_r3.xml' file too, so it might not be as simple as a file swap.</p>
  
  <p>Are there any guides, info, or blogs on how the SDK has been changed and what I need to do to make the conversion?  Have the tasks and/or parameters changed?</p>
  
  <p>Thanks,
  DD</p>