Tensor datatostring

[JimClarke5]

Updated per comments in the PR.

This new form creates TensorPrinter.

Options include:

/** The max width of a single line */
  public Integer maxWidth;

  /** The element separator character, default is {@link #DEFAULT_SEPARATOR} */
  public char separator = DEFAULT_SEPARATOR;

  /**
   * the number of digits after the decimal point for floating point numbers, null means to use
   * the default format
   */
  public Integer numDecimals;

  /** The number of spaces for each indent space */
  public Integer indentSize;

  /**
   * Indicator whether a trailing separator is present at the end of an inner set, default is
   * false.
   */
  public boolean trailingSeparator;

  /** The set of characters that enclose sets, default is {@link Enclosure#BRACKETS} */
  public Enclosure enclosure = DEFAULT_ENCLOSURE;