Update CHANGELOG.md

Author: ruevs

CHANGELOG.md

@@ -23,13 +23,28 @@ Sketching:
 
 MISC:
 
+* Add a link to the GitHub commit from which SolveSpace was built in the Help
+  menu.
+* Make all points, vectors and normals shown in the Property Browser into
+  active links. This makes them explorable and selectable.
+* Load 16bit PNG images correctly by re-scaling to 8bit.
+* Fixed hang when trying to display characters missing from the embedded font.
+* The main window vertical size can be as small as the toolbar.
+* Configurable "SafeHeight" parameter instead of the fixed 5mm for G-code export.
+* Add Spanish / Argentina translation.
+* Move "perspective factor", "lighting direction" and "explode distance" from
+  the "configuration" screen to the "view" screen.
 * Add a "∆" suffix to groups which have "force to triangle mesh" ticked
 * Gray the group name in the text window for groups with suppressed solid model.
 * Added the ability to Link STL files.
 * When linking circuit boards (IDF .emn files) show keepout regions as construction entities.
 
 Performance:
 
+* Speed up sketches with many constraints by roughly 8x by using the Eigen
+  library in the solver. The maximum unknowns increased from 1024 to 2048.
+* Add a "suppress dof calculation" setting to groups - increases performance for
+  complex sketches.
 * More changes to the ID list implementation.
 
 3.0