Changes for csv import of Third Parties and Products

[torvista]

import.php
HTML5 validation
ADDED htmlentities to enclosure and separator
CHANGED td aligns to css, removed nospan tag
ADDED clause to box generator to stop multiple duplicate ids when no $key
REMOVED height attribute
REMOVED nested b tag
CHANGED deprecated Center tag for div style center
FIX
Added check
if ($objimport->array_import_updatekeys[0] && count($objimport->array_import_updatekeys[0]
to stop php warning

modProduct.class.php
Products Import
ordered fields as per table structure order
ADDED and changed import fields and examples

modSociete.class.php
Third Party Import
Changed field orders to match table field order so future additions will be easier to manage.
REMOVED s.datec repeated in import example
ADDED: alias, payment mode, payment conditions, sales tax VAT, multicurrency, currency

Additional Address Import
Changed field orders to match table field order
import example csv was missing birthday
ADDED: alias, payment mode, payment conditions, sales tax VAT, multicurrency, currency

Bank Account Import
Changed field orders to match table field order
ADDED label (required for a bank account
ADDED datec (required for d.debit UMR)
ADDED to address import: s.fk_departement
modified text to import example csv

companies.lang
various new constants for import file column headers

[torvista]

I don't know why the commits in this branch are mixed with the last one I submitted....the changes are ok for merging....I cannot find a way to separate the language file updates from the import changes, sorry.