- allow multi-paragraph contents in grid table merged cells
- allow code-blocks in merged cells
- allow generally speaking reST contents allowed in regular
cells to be also allowed in merged cells, whether multirow,
multicolumn, or both.
This is made possible by custom LaTeX macros replacing original
``\multicolumn`` and ``\multirow`` (none of the originals allows
verbatim contents as is needed for code-blocks). They are defined in
bundled LaTeX style file sphinxmulticell.sty. The multicolumn merged
cells give much better results with tabulary as it is coerced into
taking them into account in its automatic width algorithm.
This deprecates use of LaTeX packages eqparbox and multirow, which are
not needed anymore.
New config setting ``latex_use_latex_multicolumn`` (default value False,
currently) as custom Sphinx multicolumn is not fully compatible will all
types of custom table col specs which may be inserted via tabularcolumns
directive. It works best with standard ``|`` column separator.
The default tabulary column specifier has been changed from L
(flushleft) to J (justifying). Internally the column type is called T,
so ``r'\newcolumntype{T}{L}'`` in preamble key recovers the former
behaviour. A ``\Y`` column type is defined which admits one decimal
argument in place of the two integers for ``\X``.
based on enabled "tags". Tags can be given on the command
line. Also, the current builder output format (e.g. "html" or
"latex") is always a defined tag.
