Update Readme.md

Readme.md

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 HexCoord implements hexagonal grid geometry in C#. The main fork utilizes Unity's Vector2 and Vector3 for position information, but is otherwise platform-agnostic; porting to other C# environments should be trivial.
 
-This is an implementation of Amit Patel's constrained cubic axial coordinates, described at http://www.redblobgames.com/grids/hexagons/. Briefly, it uses two axes labeled q and r. The q axis is equivalent to the x axis of a Cartesian plane; but the r axis is 60 degrees from q, rather than the 90 degrees of a Cartesian y axis. HexCoord deviates from Amit's reference example in one way: the positive r axis extends up and right, rather than down and right.
+This is an implementation of [Amit Patel's constrained cubic axial coordinates](http://www.redblobgames.com/grids/hexagons/). Briefly, it uses two axes labeled q and r. The q axis is equivalent to the x axis of a Cartesian plane; but the r axis is 60 degrees from q, rather than the 90 degrees of a Cartesian y axis. HexCoord deviates from Amit's reference example in one way: the positive r axis extends up and right, rather than down and right.
 
 For performance reasons, HexCoord is a struct. Because Unity does not serialize structs, there is also a serializable HexCoordinate class which easily converts to and from HexCoord. Use the class where serialization is needed, and the struct everywhere else.
 
-Built-in operations include:
+####Built-in operations include:
 - Conversion to and from Unity positions.
 - Conversion to and from offset-Cartesian coordinates.
 - Hexagonal grid polar coordinates (radius, position on ring).
@@ -17,4 +17,4 @@ Built-in operations include:
 - Vector addition, subtraction and scaling.
 - Robust hashing, or so I'm told.
 
-Discussion and modest support at http://www.settworks.com/forum/
+Discussion and modest support at http://www.settworks.com/forum/hexcoord