Improve TextTable API

[remkop]

• TextTable with custom columns should not require a Layout: client may want to add String values directly, not Options or Parameters field
• move method TextTable::addRow(String... values) back to TextTable
• consider moving logic for two-options-per-row (zip usage) into TextTable

Convenience method TextTable::addOption needs fields OptionRenderer and Layout to be set. Can this be refactored?

public void addOption(Field field, IValueLabelRenderer valueLabelRenderer) {
    Option option = field.getAnnotation(Option.class);
    String[][] values = optionRenderer.render(option, field, valueLabelRenderer);
    layout.layout(field, values, this);
}

[remkop]

Ideas:

• layout decide what option/parameter renderer to use (has fields for them)
• layout::addOption(Field, TextTable) calls renderer internally before adding resulting string[][] to the table
• Remove methods TextTable::addOption/Parameter
• Remove TextTable fields : layout, various renderers (move to Layout)