Some more documentation

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>

README

@@ -11,16 +11,20 @@ girara (>= 0.1.8)
 sqlite3 (optional, >= 3.5.9)
 check (for tests)
 intltool
-python-docutils (optional, for man pages)
 libmagic from file(1) (optional, for mime-type detection)
+Sphinx (optional, for manpages and HTML documentation)
+doxygen (optional, for HTML documentation)
+breathe (optional, for HTML documentation)
+sphinx_rtd_theme (optional, for HTML documentation)
 
 Please note that you need to have a working pkg-config installation and that the
 Makefile is only compatible with GNU make. If you don't have a working
 pkg-config installation please set the GTK_INC, GTK_LIB, GIRARA_INC, GIRARA_LIB,
 SQLITE_INC and SQLITE_LIB variables accordingly.
 
-And also note that rst2man from python-docutils is needed to build the man pages.
-If it is not installed, the man pages won't be built.
+Also note that Sphinx is needed to build the manpages.  If it is not
+installed, the man pages won't be built. For the HTML documentation, doxygen,
+breathe and sphinx_rtd_theme are needed in additioan to Sphinx.
 
 If you don't want to build with support for sqlite databases, you can set
 WITH_SQLITE=0 and sqlite support won't be available.

doc/Makefile

@@ -40,15 +40,12 @@ html:
 else
 man: $(SPHINX_BUILDDIR)/zathura.1 $(SPHINX_BUILDDIR)/zathurarc.5
 
-ifeq ($(shell which $(DOXYGEN_BIN) >/dev/null 2>&1; echo $$?), 0)
-ifeq ($(shell $(PYTHON_BIN) -c "import breathe; import sphinx_rtd_theme" >/dev/null 2>&1; echo $$?), 0)
+# TODO: Make a better test for breathe and sphinx_rtd_theme
+ifeq ($(shell which $(DOXYGEN_BIN) >/dev/null 2>&1 && $(PYTHON_BIN) -c "import breathe; import sphinx_rtd_theme" >/dev/null 2>&1; echo $$?), 0)
 html: $(SPHINX_BUILDDIR)/html/index.html
 else
 html:
 endif
-else
-html:
-endif
 endif
 
 .PHONY: clean html man all