http://www.medihack.org/2011/03/01/autocompletion-autosuggestion-using-solr/
http://lucene.472066.n3.nabble.com/auto-completion-search-with-solr-using-NGrams-in-SOLR-td3998559i20.html
http://stackoverflow.com/questions/2768770/how-to-structure-an-index-for-type-ahead-for-extremely-large-dataset-using-lucen
http://www.cominvent.com/2012/01/25/super-flexible-autocomplete-with-solr/
