Merge pull request #486 from timschofield/develop

Develop
Merge pull request #487 from timschofield/develop

Develop
Remove unnecessary ResrictLocations check
Change to using PascalCase as per the style guidelines
Add new quit icon for wood theme
Added location Based Security to all of these files
PascalCase variable names
Merge pull request #488 from timschofield/develop

Develop
More work on making all variable names pascal case
Merge pull request #489 from timschofield/develop

More work on making all variable names pascal case
Improvements to the security of the login process
Merge pull request #490 from timschofield/develop

Improvements to the security of the login process
Added Location based security to these files
In Z_poRebuildDefault.php: extends title, improves comments, sets file to pot, updates $FilesToInclude, renames old pot file to bak extension. Minor improvements.
In SupplierInquiry.php: makes the field systypes.typename be translatable.
Add Location Based security. Fix issues with PDFDIFOT.php where some queries said '<' and 1 used '>=' Changed all to '>=' so report would show the late deliveries
Merge pull request #491 from timschofield/develop

Develop
Further work standardising variable names
In CustomerInquiry.php: Adds class ascending and reorganizes columns Date, Type, Number and Reference; Regroups table-datacel format-strings, completes the datacel quantity by table-row; makes translatable the systypes.typename.
Kelo: fix SupplierBalsAtPeriodEnd