[ADD]added new module hr_material

Hello,
    I have added new module hr_material
    purpose:
    - which allows you to easily keep track of office materials.
    - It stores information about the materials and it's status,whether it is assigned to some employee or department or it is in under repair(under maintenance) etc...
    - An employee will send a maintenance request through the system if any fault is encountered in the material assigned to him.
    For more detials see : https://pad.openerp.com/p/openerp-project.task-KM3TRSESU5
Thanks,
DKA