2.6.0++

• Update FLTK to 1.3.6
• Support the DARKNESS palette for Flash darkness
• Trim unused blank tiles from the end before saving a tileset
• Allow pasting graphics in the tileset editor to affect multiple tiles
• Remember if the window is full-screen or maximized
• Fix opening files with special characters in their path name
• Fix saving tilesets with fewer than 16 tiles
• Fix some potential crashes from invalid input