Add global method to set logger closure

Add information into README.md

README.md

@@ -234,6 +234,11 @@ The `debugEnabled` configuration is useful for testing how your review prompt po
 	GETTER: Armchair.debugEnabled() -> Bool
 	SETTER: Armchair.debugEnabled(debugEnabled: Bool)
 
+##### Logging
+  Armchair allows you to set a closure to capture debug log and to plug in the desired logging framework.
+
+	Armchair.logger(logger: ArmchairLogger)
+
 ##### iOS Only Configuration
 
 These configuration functions only make sense for iOS builds due to their dependency on iOS-only frameworks and functions.

Source/Armchair.swift

@@ -563,6 +563,18 @@ public func shouldIncrementUseCountClosure(shouldIncrementUseCountClosure: Armch
     Manager.defaultManager.shouldIncrementUseCountClosure = shouldIncrementUseCountClosure
 }
 
+
+
+// MARK: Armchair Logger Protocol
+public typealias ArmchairLogger = (Manager, log: String, file: StaticString, function: StaticString, line: UInt) -> Void
+
+/*
+* Set a closure to capture debug log and to plug in the desired logging framework.
+*/
+public func logger(logger: ArmchairLogger) {
+    Manager.defaultManager.logger = logger
+}
+
 // MARK: -
 // MARK: Armchair Defaults Protocol
 
@@ -1715,8 +1727,6 @@ public class Manager : ArmchairManager {
     // MARK: -
     // MARK: Debug
 
-    public typealias ArmchairLogger = (Manager, log: String, file: StaticString, function: StaticString, line: UInt) -> Void
-
     let lockQueue = dispatch_queue_create("com.armchair.lockqueue", nil)
 
     public var logger: ArmchairLogger = { manager, log, file, function, line in