Integrate PRs #159, #166 and #174 for 0.3.0

docs/book/src/guide/getting-started.md

@@ -8,7 +8,7 @@ were released under the SolveCraft name.
 
 Download the latest build from the
 [releases page](https://github.com/bherbruck/solidcraft/releases), or build it yourself with
-stable Rust (1.90 or newer):
+stable Rust (1.95 or newer):
 
 ```sh
 git clone https://github.com/bherbruck/solidcraft && cd solidcraft

docs/book/src/guide/sketching.md

@@ -96,6 +96,9 @@ distinct straight lines. Two lines join their closest pair of endpoints; the fir
 picked line stays in place when the existing constraints allow it. Pick endpoints
 explicitly when you want to connect a different pair.
 
+Horizontal/Vertical also applies immediately to one selected line or two distinct selected
+points. Shift-click to add the second point before choosing the constraint.
+
 For Parallel, Perpendicular, Equal, Tangent, Concentric and Collinear, select exactly two
 sketch curves (Shift-click to add the second) and choose the constraint to apply it immediately.
 You can also start the constraint first and then pick its curves. An incomplete or mixed