docs: Importing initial set of library documentation from wiki

To build documentation, doxygen (+graphviz dot) and sphinx-build are
required.  Manpages are build and installed during `./waf build` stage
if sphinx-build is present.

Documentation can be build using the following commands:

    # Full set of documentation (tutorials + API) in build/docs
    ./waf docs

    # Only tutorials in `build/docs`
    ./waf sphinx

    # Only API docs in `build/docs/doxygen`
    ./waf doxgyen

Change-Id: I4c08be08ca3e22068db54584f99467aa6cf38d04
Refs: #1462
diff --git a/docs/named_data_theme/theme.conf b/docs/named_data_theme/theme.conf
new file mode 100644
index 0000000..aa5a7ff
--- /dev/null
+++ b/docs/named_data_theme/theme.conf
@@ -0,0 +1,15 @@
+[theme]
+inherit = agogo
+stylesheet = named_data_style.css
+# pygments_style = sphinx
+
+theme_bodyfont = "normal 12px Verdana, sans-serif"
+theme_bgcolor = "#ccc"
+
+theme_documentwidth = "100%"
+theme_textalign = "left"
+
+[options]
+
+stickysidebar = true
+collapsiblesidebar = true