Merge branch 'develop' into 1.10.x

include/class.attachment.php

include/class.auth.php

include/class.client.php

include/class.config.php

include/class.cron.php

include/class.filter.php

include/class.format.php

include/class.forms.php

include/class.mailer.php

include/class.pdf.php

include/class.role.php

include/class.staff.php

include/class.user.php

include/class.variable.php

include/client/templates/sidebar.tmpl.php

include/mpdf/ttfonts/XB Riyaz.ttf

include/mpdf/ttfonts/XB RiyazBd.ttf

include/mpdf/ttfonts/XB RiyazBdIt.ttf

include/mpdf/ttfonts/XB RiyazIt.ttf

include/mpdf/ttfonts/XB Zar Bd.ttf