rename generator & verifier to match Swift conventions

Dropping the prefix "CocoaFob" and spelling out the names, they
become `LicenseGenerator` and `LicenseVerifier`. The old type names
are provided as internal (!) typealiases for folks who did not use
the framework in the past but copied the code in.

Author: DivineDominion

swift3/CocoaFob/CocoaFobLicGenerator.swift

@@ -1,5 +1,5 @@
 //
-//  CocoaFobKeyGenerator.swift
+//  CocoaFobLicGenerator.swift
 //  CocoaFob
 //
 //  Created by Gleb Dolgich on 05/07/2015.
@@ -8,10 +8,13 @@
 
 import Foundation
 
+@available(*, deprecated: 1.0, renamed: "LicenseGenerator")
+typealias CocoaFobLicGenerator = LicenseGenerator
+
 /**
 Generates CocoaFob registration keys
 */
-public struct CocoaFobLicGenerator {
+public struct LicenseGenerator {
 
   var privKey: SecKey
 

swift3/CocoaFob/CocoaFobLicVerifier.swift

@@ -8,10 +8,13 @@
 
 import Foundation
 
+@available(*, deprecated: 1.0, renamed: "LicenseVerifier")
+typealias CocoaFobLicVerifier = LicenseVerifier
+
 /**
 Verifies CocoaFob registration keys
 */
-public struct CocoaFobLicVerifier {
+public struct LicenseVerifier {
 
   var pubKey: SecKey