We already lower-bound tagsoup at 0.13.7, which means we were always
running the compatibility layer (it was conditional on min value
0.13). Better to just use `lookupEntity` from the library directly, and
convert a string to a char if need be.
- The (non-exported) prelude is in prelude/Prelude.hs.
- It exports Monoid and Applicative, like base 4.8 prelude,
but works with older base versions.
- It exports (<>) for mappend.
- It hides 'catch' on older base versions.
This allows us to remove many imports of Data.Monoid
and Control.Applicative, and remove Text.Pandoc.Compat.Monoid.
It should allow us to use -Wall again for ghc 7.10.
The _note attribute is supported. This is unofficial, but
used e.g. in OmniOutliner and supported by multimarkdown.
We treat the contents as markdown blocks under a section
header.
Added to documentation and tests.
