Nicer tables episode II (#111)

* Make headrow in tables bold

* Simplify tables markup

- Markup is definitely simpler.
- Will not be built separately in a pdf anymore.
- Fixed some typo as well
- Relatively coherent look
- Can be better, some sizes are relatively arbitrary

* Remove horizontal separation inside tables

Not very nice if you ask me..

* Fix some tables for the ebook

The alignement trick to have nicely alignment on = sign or on unit (g)
used broke the html. Reverting to a less optimal version on pdf while
not breaking the html.

* Simplify table for html output

* Revert "Simplify table for html output"

This reverts commit f85d65adb7.

* Revert pancake table

This way it builds ebook correctly.

book/tables/table-flat-bread-pancake-recipe.tex

@@ -1,14 +1,11 @@
-\input{./vars}
-
-\begin{document}
-\begin{tabular}{lll}
+%TODO: last line is not great
+-\begin{tabular}{lll}
 \toprule
-                           & \textbf{Flat breads} & \textbf{Pancakes}                        \\ \midrule
-\textbf{Flour}             & 100g                               & 100g                       \\ \midrule
-\textbf{Water}             & 100g (100\%)                       & 300g (300\%)               \\ \midrule
-\textbf{Sourdough starter} & 5-20g (5-20\%)                     & 5-20g (5-20\%)             \\ \midrule
-\textbf{Salt}              & 2g (2\%)                           & 2g (2\%)                   \\ \midrule
-\textbf{When bake?}        & Dough increased 50 percent in size & Bubbles
-visible on surface \\ \bottomrule
+                           & \textbf{Flat breads}               & \textbf{Pancakes}          \\ \midrule
+\textbf{Flour}             & 100g                               & 100g                       \\ 
+\textbf{Water}             & 100g (100\%)                       & 300g (300\%)               \\ 
+\textbf{Sourdough starter} & 5--20g (5--20\%)                   & 5--20g (5--20\%)           \\ 
+\textbf{Salt}              & 2g (2\%)                           & 2g (2\%)                   \\ 
+\textbf{Bake when?}        & Dough increased 50 percent in size & Bubbles visible on surface \\ \bottomrule
+\bottomrule
 \end{tabular}
-\end{document}