copied projectxls part to projecthtml
added htmltimetable.php, renamed $excelfile to $htmlfile
added methods to htmltimetable
adopted code of projecthtml (dreived from projectpdf)
adapted styles and graphics for html timetable
corrected some var names, added css, made html timetable open in new
window/tab
cleaned code, added html doctype definition
Merge branch 'html-time-export' into OpenID