title: Google App Engine datastore for Go does not have != filter
body: <p>I am messing with GAE for go recently and found it misses fundamental != (not equal to) filter in their datastore API.</p>
  
  <p><a href="https://developers.google.com/appengine/docs/go/datastore/queries#Go_Property_filters" rel="noreferrer">https://developers.google.com/appengine/docs/go/datastore/queries#Go_Property_filters</a></p>
  
  <p>It also has no "OR" condition operand.</p>
  
  <p>Could anyone tell me how could I filter data which is not equal to something?</p>