The API needs to be changed to tidy things up and fix mistakes

[taye]

The following problems should be addressed:

• Settings like snap, inertia, etc. should be per-action #87 - Settings like snap, inertia, etc. should be per-action. PR Per-action settings #115
• Resize restriction is broken #84 - Resize restriction is broken. Partly fixed by per-action settings.
• Resizing from top or left border disabled by default #37 - Resizing from top or left border disabled by default. PR Allow resizing from top and left edges in addition to bottom and right #145
• Interactable methods like inertia, snap, restrict shouldn't have equivalent methods on the interact object #94 - Interactable methods like inertia, snap, restrict shouldn't have equivalent methods on the interact object. Commit 3a3bc76
• Need to unify grid, acnhor and path snapping #121 - Need to unify grid, acnhor and path snapping. PR Unify snap modes #127.
• Drop-related events shouldn't be InteractEvent objects #122 - Drop-related events shouldn't be InteractEvent objects. Commit 2bb8b43