Add the new paperless_tika parser

This parser will use an external Tika and Gotenberg server to parse
"Office" documents (.doc, .xls, .odt, etc.)

Signed-off-by: Jo Vandeginste <Jo.Vandeginste@kuleuven.be>

Pipfile

@@ -42,6 +42,7 @@ whoosh="~=2.7.4"
 inotifyrecursive = "~=0.3.4"
 ocrmypdf = "*"
 tqdm = "*"
+tika = "*"
 
 [dev-packages]
 coveralls = "*"