Fix compile time warnings

Merge branch 'master' of github.com:johanmattssonm/birdfont

Merge branch '2.x' of github.com:johanmattssonm/birdfont into 2.x
Version 2.16.12

Merge ../birdfont-2.x

Fix symmetrical handles

Merge branch '2.x' of github.com:johanmattssonm/birdfont into 2.x

Merge ../birdfont-2.x

Fix symmetrical handles

Merge branch 'master' of github.com:johanmattssonm/birdfont

Allow changing proportions when glyphs are resized

Remove old code

Prettier flags

White space fixes

Align stroke to outline

Draw filled open paths
This commit moves recalculate_linear_handles to the Path class in order
to set handle position for end points.

Revert "Replace the list implementation"

This reverts commit 0adae802c16b3eb48db79633ab068a6ab008224e.

It introduced a number of new bugs and was slower than the list
implementation.

Replace the list implementation
This commit removes the next and prev references from EditPoint

Speed optimizations and benchmarks

Fix stroke corners

Merge self intersections

Merge self intersections

Merge curves

Remove debug info

Debug memory leak

Stroke