Created and introduced the Token.java class. It is the abstraction of a
token, some string value found between two other delimiters. In this
project, delimiters are represented as Tokens. Created and introduced
the TokenChain.java class, which represents a list of consecutive tokens
and, as such a representation, encapsulates a list of Tokens. Refactored
the Tokenizer.java class away from a static helper class, to an object
that contains a list of delimiters and can parse strings into
TokenBuffers, by the parse() method.