doc: add functions TOC

README.md

@@ -82,6 +82,17 @@ af_tools.xf2mat(args)
   will prompt the user for the few mandatory arguments while the others will be
   set to their default values.
 
+List of functions:
+
+- [xf2mat](#xf2mat): Aggregates multiple XFOIL or XFLR5 polar results into a single structure.
+- [extendpolar](#extendpolar): Extends polars to the full range of $`\alpha`$ ([-180, 180] deg).
+- [nacacamber](#nacacamber): Generates the coordinates of the camberline for a NACA 4 or 5 digits airfoil.
+- [nacaairfoil](#nacaairfoil): Generates the full coordinates of a NACA 4 or 5 digits airfoil.
+- [plotpolars](#plotpolars): Plot various polars.
+- [findstall](#findstall): Finds the stall point and returns the corresponding $`\alpha`$, $`C_l`$ and $`C_d`$.
+- [findzerolift](#findzerolift): Finds the zero-lift angle and the associate $`C_d`$.
+- [findcllinearrange](#findcllinearrange): Finds the linear range of the lift coefficient and returns the range and lift slope.
+
 ### xf2mat
 
 Aggregates airfoil polars obtained using [XFOIL v6.99][xfoil] of [XFLR5