Remove Swift files
Move Objective-C files out of Legacy folders
Add MIT License
Add podspec
Include public headers in OneTimePassword.h
Merge branch 'objc'

Conflicts:
	OneTimePassword.xcodeproj/project.pbxproj
	OneTimePassword/Legacy/NSDictionary+QueryString.h
	OneTimePassword/Legacy/NSDictionary+QueryString.m
	OneTimePassword/Legacy/NSString+PercentEncoding.h
	OneTimePassword/Legacy/NSString+PercentEncoding.m
	OneTimePassword/Legacy/OTPGenerator.h
	OneTimePassword/Legacy/OTPGenerator.m
	OneTimePassword/Legacy/OTPPersistence.h
	OneTimePassword/Legacy/OTPToken+Generation.h
	OneTimePassword/Legacy/OTPToken+Generation.m
	OneTimePassword/Legacy/OTPToken+Serialization.h
	OneTimePassword/Legacy/OTPTokenType.h
	OneTimePassword/NSDictionary+QueryString.h
	OneTimePassword/NSDictionary+QueryString.m
	OneTimePassword/NSString+PercentEncoding.h
	OneTimePassword/NSString+PercentEncoding.m
	OneTimePassword/OTPAlgorithm.h
	OneTimePassword/OTPAlgorithm.m
	OneTimePassword/OTPToken+Generation.h
	OneTimePassword/OTPToken+Generation.m
	OneTimePassword/OTPToken+Persistence.h
	OneTimePassword/OTPToken+Persistence.m
	OneTimePassword/OTPToken+Serialization.h
	OneTimePassword/OTPToken+Serialization.m
	OneTimePassword/OTPToken.h
	OneTimePassword/OTPToken.m
	OneTimePassword/OTPTokenType.h
	OneTimePassword/OTPTokenType.m
	OneTimePassword/OneTimePassword.h
	OneTimePasswordLegacy/OTPTypes.h
	OneTimePasswordLegacyTests/NSDictionary+QueryString.h
	OneTimePasswordLegacyTests/NSDictionary+QueryString.m
	OneTimePasswordLegacyTests/NSString+PercentEncoding.h
	OneTimePasswordLegacyTests/NSString+PercentEncoding.m
	OneTimePasswordLegacyTests/OTPTokenGenerationTests.m
	OneTimePasswordLegacyTests/OTPTokenPersistenceTests.m
	OneTimePasswordLegacyTests/OTPTokenSerializationTests.m
	OneTimePasswordTests/Legacy/OTPTokenGenerationTests.m
	OneTimePasswordTests/Legacy/OTPTokenPersistenceTests.m
	OneTimePasswordTests/Legacy/OTPTokenSerializationTests.m
	OneTimePasswordTests/OTPTokenGenerationTests.m
	OneTimePasswordTests/OTPTokenPersistenceTests.m
	OneTimePasswordTests/OTPTokenSerializationTests.m
	OneTimePasswordTests/TokenSerializationTests.swift