Merge branch 'master' of https://github.com/bireme/SimilarDocs

 version 6.2.0 updated libraries

 version 6.1.3 Reduced the interval of days left after iahx update

 version 4.3.1 issue #38

 version 3.4.1 it was allowing duplicated ids in the search index

 version 1.1.9 SimilarDocsServiceTest bug fix

 version 1.1.6 IndexTest procedure fixed

 now checking service function parameters

 searchPreProcessed