Add document file formats for upload

The following extension is added.
- .docx
- .pptx
- .txt
- .xlsx

project/build.scala

@@ -56,6 +56,7 @@ object MyBuild extends Build {
       "org.apache.commons" % "commons-email" % "1.3.3",
       "org.apache.httpcomponents" % "httpclient" % "4.3.6",
       "org.apache.sshd" % "apache-sshd" % "0.11.0",
+      "org.apache.tika" % "tika-core" % "1.10",
       "com.typesafe.slick" %% "slick" % "2.1.0",
       "com.novell.ldap" % "jldap" % "2009-10-07",
       "com.h2database" % "h2" % "1.4.180",