0.3.9 - HTML Table writer, defect fixes, refactoring and documentation updates

Refactored: Changing package structure from com.btaz.datautil to com.btaz.util
New Feature: HtmlTableWriter - makes it easy to write tabular data into an HTML file
New Feature: HtmlEscape.escape(...) - this method escapes HTML so that it can be displayed as text within HTML
Defect: Content flat format defect fix.
Modified: Documentation