Fix documentation for direction normalization

Author: jeremyong

docs/api/kln::direction.md

@@ -55,7 +55,7 @@ Create a normalized direction.
 Normalize this direction by dividing all components by the square magnitude
 
 !!! tip 
-    Point normalization divides the coordinates by the quantity
+    Direction normalization divides the coordinates by the quantity
     a^2 + b^2 + c^2. This is done using the `rcpps` instruction with a
     maximum relative error of $1.5\times 2^{-12}$.
 

docs/roadmap.md

@@ -1,6 +1,5 @@
 ## Items needed for a 1.0 release
 
 - Provide a fallback for SSE2 in case SSE4.1 isn't available
-- Sandwich operator for lines
 - Tutorial
 - Sample code