Add BREAD_CRUMB_TRAIL.

This feature enables recursive printing of the bread crumbs for any
page, rather than just printing the parent group.
Bug 733938 - Explicit links using operator()() not generated.
Bug 734077 - no uniquely matching class member found for inline function definition where parameter argument names don't match
cache anonymous into ClassDefImpl::isAnonymous
Bug 734099 - Add support for non-parsed language
Merge branch 'master' of github.com:doxygen/doxygen
Merge branch 'bug734099'
Bug 733605 - Incorrect LaTeX generation for private union member in C++
Bug 728740 - XML Output: Doxygen doesn’t escape & characters (included in a hyperlink) in <detaileddescription>
Merge branch 'master' of https://github.com/groleo/doxygen-1 into groleo-master
Made setName() virtual so overloading works
Merge branch 'groleo-master'
Fixed test 021
Merge branch 'feature-groupbreadcrumbs' of https://github.com/NimbusKit/doxygen into NimbusKit-feature-groupbreadcrumbs
Made bread crumb trails enabled unconditionally
Merge branch 'NimbusKit-feature-groupbreadcrumbs'