Support for recursive types

Merge pull request #46 from drug007/broken_window_resizing

Fix #45 Broken window resizing

Merge pull request #40 from drug007/bugs

Fixed bugs

Merge pull request #39 from drug007/sdl_app

Sdl app

Merge pull request #38 from drug007/github-actions

Fix #37

Merge pull request #35 from drug007/fix_issue_34

Close #34 `sdl example not building by ldc2`

Merge pull request #32 from drug007/apply_by_tree_path

Add applyByTreePath

Merge pull request #31 from drug007/workaround_for_dsemver

Minor refactoring to satisfy dsemver

Merge pull request #30 from drug007/cumulative-changes

Cumulative changes

GLCanvas fixed