Merge pull request #433 from timschofield/develop

Develop
Use printer.png for printing
Add a margin at the bottom
Merge pull request #434 from fahadhatib/develop

Develop
Merge branch 'develop' of https://github.com/KwaMoja/KwaMoja into develop
Fixes bug in MRP.php that quantity which stated in PO with
lines not completed but with PO status marked completed are
calculated as supplies
Merge pull request #435 from fahadhatib/develop

Fixes bug in MRP.php that quantity which stated in PO with
Merge branch 'develop' of https://github.com/KwaMoja/KwaMoja into develop
Includes quotation date in header (instead of quotation creation date) and quotation number in file name.
Merge branch 'develop' into payroll