Support from HST Query Filter to do equals case-insensitive and sort by case-insensitive

Since Jackrabbit 2.6 has support for doing equals searches and order by with fn:lower-case or fn:upper-case we can support in the HST api the following:

HstQuery now has
void addOrderByAscending(String fieldNameAttribute);
void addOrderByDescending(String fieldNameAttribute);

we can add
void addOrderByAscendingCaseInsensitive(String fieldNameAttribute);
void addOrderByDescendingCaseInsensitive(String fieldNameAttribute);

To Filter we now have
void addEqualTo(String fieldAttributeName, Object value) throws FilterException ;
void addNotEqualTo(String fieldAttributeName, Object value) throws FilterException ;

we can add
void addEqualToCaseInsensitive(String fieldAttributeName, Object value) throws FilterException ;
void addNotEqualToCaseInsensitive(String fieldAttributeName, Object value) throws FilterException ;