Add icd9 and minor fixes to the following:
add_edit_event.php - spelling chg and add xl()
main_screen.php - correct placement of head tag
deleter.php - correct closing tag on cancel button
demographics.php - fix width of second column div background
add_transaction.php - fix location of close form tag
style_default.css - fix widths tabbed column divs and backgounds to percentages
gen_x12_837.inc.php - POS formatting to avoid stripping the leading zero
sql/icd9-codes-insert.sql - add to distro
sql/icd9-codes-replace.sql - add to distro
Signed-off-by: tmccormi <tony@mi-squared.com>