Class containing static methods for some particular conversions
The methods converting strings to intorlong are faster that the regular
Java classes (Integer.parseInt() or Long.parseLong())
Closes all remaining opened tags
As an XML file must be embedded in one main tag, and as this method
closes ALL tags, including the main one, this method can be called only
once during an XML file creation, and at its end !
Closes the opened tags with their endtag mark ()
until finding a tag with the same name as the one specified
If several tags with the name name are opened, the process will stop
after having encountered the first one.