Update how to contribute link in README
NXP-11676: upgrade pdfbox
NXP-8234: upgrade Apache POI to 3.10-FINAL
NXP-14484: Upgrade lucene to 4.7.2
NXP-14490: Upgrade to nuxeo-connect-client 1.4.16
NXP-13880: cleanup
NXP-14495: move SQLBlob outside of VCS
NXP-14484: Move lucene and elasticsearch dep to root pom
NXP-14436: upgrade snakeyaml version to latest stable 1.13
NXP-14117 added tranql dependency for pooling managed datasources
NXP-14117 use correct jdbc api (tranql)