* Add LintableFilesVisitor
* Move LintCommand logic into LintOrAnalyzeCommand
to prepare for the upcoming analyze command
* Add AnalyzeCommand (not fully implemented yet in SwiftLintFramework)
* Add analyzerRules configuration member
* Add AnalyzerRule protocol
* Pass compiler arguments to validate/correct
* Add requiresFileOnDisk member to RuleDescription
This will be used by AnalyzerRules because they need a file on disk
to pass in the compiler arguments to SourceKit.
* Exclusively run AnalyzerRules when the Linter has compiler arguments
* Enable testing AnalyzerRules in TestHelpers
* Add ExplicitSelfRule
* Update documentation
* Fix `analyze --autocorrect`
* Improve performance of CompilerArgumentsExtractor
* Fix lint command actually running analyze
* Move File operations in TestHelpers into a private extension
* Add analyzer column to rules command and markdown documentation
* Use a Set literal
* Make AnalyzerRule inherit from OptInRule
* Mention analyzer_rules in readme
* Mention that analyzer rules are slow