Need to be able to suppress compound reference suffixes from page titles, such
as "Class Reference". I propose a new HIDE_COMPOUND_REFERENCE config option
which is, by default NO (reflecting current implementation), but, can be changed
by the user to YES.

The recommended addition to config.xml will be something like:

    <option type='bool' id='HIDE_COMPOUND_REFERENCE' defval='0'>
      <docs>
<![CDATA[
 If the \c HIDE_COMPOUND_REFERENCE tag is set to \c NO (default) then
 doxygen will append localized compound reference suffix to a page's title,
 such as Class Reference. If set to \c YES then no compound reference suffix
 will be added.
]]>
      </docs>
    </option>

The recommended change to classdef.cpp will be something like:

    if (Config_getBool("HIDE_COMPOUND_REFERENCE"))
    {
      pageTitle = displayName();
    }
    else
    {
      pageTitle = theTranslator->trCompoundReference(displayName(),
                m_impl->compType == Interface && getLanguage()==SrcLangExt_ObjC ? Class : m_impl->compType,
                m_impl->tempArgs != 0);
    }