• [breaking change] Use struct keyword instead of flags to define bitflag types (#84)
• [breaking change] Terminate const items with semicolons instead of commas (#87)
• Implement the Hex, Octal, and Binary formatting traits (#86)
• Printing an empty flag value with the Debug trait now prints "(empty)" instead of nothing (#85)
• The bitflags! macro can now be used inside of a fn body, to define a type local to that function (#74)