Material Design icons

Fixed md theme name

[Qual] OOP detection of PHP MySQL driver

New HRM Add bank tab in user to pay salary or expense report

Icons from https://www.google.com/design/icons/
Licenced under CC BY 4.0

Update fraise.modules.php

add constant FICHINTER_EMPTY_LINE_DESC to allow empty line descriptions in interventions

following discussion with eldy (https://github.com/Dolibarr/dolibarr/pull/4079#issuecomment-161601400) to mix a french forum membre to select mailing member by type, I try to update this selector to integrate selection by type.
Thanks in advance for feedback

Conflicts:
	htdocs/holiday/card.php
	htdocs/resource/list.php

FIX : Cannot change the date of a contract #4088

[Qual] More robust sorting

Update products.lang - include translation for units key in product/card.php

Fix #4137 Salaries parameter saving

FIX: Cannot set property '_renderItem of undefined 

field is not required by dolibarr core.