A patch from Leon for "Birt 4.2, export report as MS 2007 document format" https://issues.apache.org/jira/browse/OFBIZ-5653

One of the new features of Birt 4.2 is the capability to export report as MS 2007 format, such as .docx, .xlsx and .pptx.
Birt library in OFBiz trunk has already been upgrade to version 4.3.1. So it's ready to introduce this new feature into ofbiz.

patch: 3 new content types for MS 2007 word, excel and ppt. Also update the help xml and comments in controll.xml.

git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1602334 13f79535-47bb-0310-9956-ffa450edef68