DOCS: generate treeview in sidebar and hide footer
DOCS: move tutorial text into apps.dox
AIDACC: fix up documentation wording
RCORE: loop.cc: use lowercase page name
UI: widget.dox: use lowercase page name
DOCS: document ways and resource for contributions
DOCS: restructure main page and introduction
DOCS: import/: add doxygen tagfile from http://cppreference.com/
DOCS: include cppreference.com std::* links in documentation builds
AIDACC: update reference counting and shared/weak_ptr links in docs
DOCS: some rewording, fix licensing info and links
DOCS: allow patching the Doxygen layout with DOXYGEN_LAYOUT_DIFF
DOCS: layout.diff: remove buggy namespace members and add function index
DOCS: make SVG class trees zoomable
DOCS: allow 'todo' and 'bug' subpage commands
DOCS: adjust content table links and fix duplicate subpage
DOCS: add "Settings and Configuration" section to manual
DOCS: fix chapter index by making Introduction its own section
DOCS: fix font families and sizes
DOCS: disable #nav-sync which can be confusing