Update datatypes_conf.xml.sample add docx type (galaxyproject#192)

* Update datatypes_conf.xml.sample add docx type

* Update datatypes_conf.xml.sample docx -> Docx

* Update binary.py add docx type

* Update binary.py

* Update datatypes_conf.xml.sample

---------

Co-authored-by: Björn Grüning <bjoern@gruenings.eu>

Author: yvanlebras

lib/galaxy/config/sample/datatypes_conf.xml.sample

@@ -558,6 +558,8 @@
     <!-- Excel datatypes -->
     <datatype extension="excel.xls" type="galaxy.datatypes.binary:ExcelXls" display_in_upload="true"/>
     <datatype extension="xlsx" type="galaxy.datatypes.binary:Xlsx" display_in_upload="true"/>
+    <!-- Word datatypes -->
+    <datatype extension="docx" type="galaxy.datatypes.binary:Binary" subclass="true"/>
     <datatype extension="btwisted" type="galaxy.datatypes.data:Text" subclass="true"/>
     <datatype extension="cai" type="galaxy.datatypes.data:Text" subclass="true"/>
     <datatype extension="cat_db" type="galaxy.datatypes.data:Text" subclass="true"/>