v0.2.3

• Write GIF metadata properly.
  • Previously, frame metadata were written along with global metadata that the header had been duplicated.
• Allow manipulation dialogue to be resized if necessary.
  • Left-double-click on client area enables resizing through dragging the window edges.
  • The calculation for listview width is also corrected.
• Tidy up DxLib setup.
  • Put Windows specific functions properly into macro block.
  • Disable device reset regardless of window mode.