v2.9.0

• Synopsis can be shown in a more compact format for complex apps (See #160)
• Full synopsis now shows flags and switches in the correct location on the command line (See #162)
• Flags can now be made required and GLI will error if they are omitted (See #161)
• Generated gemspec now uses git by default to get the file list (See #159, thanks to @JesseHerrick!)

Also, some documentation updates:

• Controlling help output
• Declaring flags and switches