Fix #3158 can't change date in invoices

supported by sqlite, so choice is hidden

NEW add hook in send mail

Fix #3183 Make sure FormOther class is included.

abstract because this break compatibility with a lot of external module
and generate FATAL errors after migration. Because PHP is not yet able
to manage try catch on FATAL error, we can't catch such error. Using
bstract on constructor is so postponed.

Fix #3166 : An accounting account can be alphanumeric (Need for EBP)

Update accountancy Step 2

Update accountancy 1st step

FIX #2832: Fixed a problem with special characters in expense report PDF model

Created abstract functions DolibarrModules::__construct, DolibarrModules::init and DolibarrModules::remove

Created abstract functions DolibarrModules::__construct, DolibarrModules::init and DolibarrModules::remove

[Qual] Reviewed commonobject

Install

Created function SupplierInvoiceLine::update and added missing localtax1_type and localtax2_type properties

Fix: jquery path

Added missing fields
Removed unused variables
Documented methods parameters
Checked return points