main
add missing image
docs: Consistently capitalise page titles
docs: Fix typo
docs: Port the man pages from DocBook to reStructuredText
Drop G_GNUC_CONST for *_get_type
docs: Add source location URL
Build HTML versions of the man pages
docs: Clarify default/user signal handlers
docs: Move the GObject tutorial to Markdown
docs: Move the GType SECTION
docs: Move the value collection documentation to Markdown