Add empty file to doc/html.

[vkni]

Fix for issue #88. We need to have doc/html directory in order to be able to generate HeVeA documentation. Since git does not let store empty directories, I added .empty file to doc/html, just like Gerd added doc/tex/.empty

[gerdstolpmann]

That's it? Really?

[vkni]

Yes. You can try - install hevea, clone omake repo to empty directory, run ./configure && make. Then run mkdir doc/html and make.

On stackoverflow they recommend adding .gitignore, but since you already added .empty to doc/tex, it is better to have similar file in doc/html.

Or you can just add mkdir -p html to line 217 of doc/OMakefile. But as for me, doc/html/.empty is better. ;-)