Added Data Collection from prev. repository

Sources/SwiftNLP/0. Utilities/SNLPCorpus.swift

Sources/SwiftNLP/0. Utilities/SNLPDictionary.swift

Sources/SwiftNLP/0. Utilities/SNLPTopicModel.swift

Sources/SwiftNLP/1. Data Collection/AnyDecodableValue.swift

...s/SwiftNLP/1. Data Collection/ReadRedditCommentFile.swift

Sources/SwiftNLP/1. Data Collection/RedditAuth.swift

Sources/SwiftNLP/1. Data Collection/RedditAuthResponse.swift

Sources/SwiftNLP/1. Data Collection/RedditComment.swift

Sources/SwiftNLP/1. Data Collection/RedditCommentData.swift

Sources/SwiftNLP/1. Data Collection/RedditSubmission.swift

...es/SwiftNLP/1. Data Collection/RedditSubmissionData.swift

...wiftNLP/1. Data Collection/readRedditSubmissionData.swift