Case insensitive searching in DataTables

Feature request from https://groups.google.com/d/msgid/shiny-discuss/528c4c7f-0fd3-4dbe-9a9c-bdb2018ed229%40googlegroups.com
Good question. No, it is not possible for `caseInsensitive` to be missing, since I have hard-coded it in the ajax call.

For `q$search`, yes, it is possible (but very unlikely, I think) in the future, but not for DataTables 1.10.2.