title: Maven 3.0.5 vs 3.1.1 vs 3.2.1
body: <p>Today I've visited <a href="http://maven.apache.org/">official Maven website</a> and was surprised to see 3 versions listed there: 3.0.5, 3.1.1, and 3.2.1</p>
  
  <p>I am currently using 3.0.5, and would like to know if I should upgrade to a newer version.</p>
  
  <p>Unfortunately, there is not a single word on the website about what is different between versions, and whether it is recommended to upgrade, and if upgrade to what version.</p>
  
  <p>Can anyone point to the relevant resources?</p>