Commits
Heinrich Schuchardt committed bb9a76ea67f
travis: build HTML docs Several patches delivered incorrect restructured text as documentation. We should be able to discover this in Travis CI. Provide a build step for 'make htmldocs'. Add required package graphviz. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>