On the road to V1

[thrawn01]

Purpose

Get the library ready for a v1.0 release

Implementation

• Config for the parser is now fluent-style
• Renamed AddOption to AddFlag
• Added Usage() to set custom usage message
• Renamed args.ArgParser to args.Parser
• Renamed SetLog() to Log()
• Made some methods private
• Added PrefixChars() to overide the flag prefix
• Added Epilog() to display after help message
• Added Short() to specify abrev alias for flags
• args.Parse() not longer returns nil *Options
• Removed args.HelpError and related functions
• Parse() and related methods no longer accept a pointer to an slice
• Added Options.SubCommands() and Options.SetSubCommands()
• Asking for help exits with return code 0 instead of 1
• Made HasHelpFlag() public
• Added Parser.Parent() and Parser.Parents()
• Removed RuleModifier.Key()
• Added new struct args.Key for backends to use
• Improved validation error messages
• No longer allowing shell special characters in rule names
• INI Parser now watches and reports config changes not just file modifications

[coveralls]

Coverage increased (+0.8%) to 68.562% when pulling 08f5359 on road-to-v1 into d582419 on master.

[coveralls]

Coverage increased (+0.9%) to 68.629% when pulling 84594cc on road-to-v1 into d582419 on master.

[coveralls]

Coverage increased (+1.0%) to 68.741% when pulling 484c895 on road-to-v1 into d582419 on master.

[coveralls]

Coverage increased (+1.07%) to 68.854% when pulling c382b60 on road-to-v1 into 1cbcd84 on master.

[coveralls]

Coverage increased (+1.05%) to 68.837% when pulling db4c7b2 on road-to-v1 into 1cbcd84 on master.

[coveralls]

Coverage increased (+1.2%) to 68.945% when pulling b2cd381 on road-to-v1 into 1cbcd84 on master.