Change of the export format (waiting french translation before the merge to the master)

The export configuration is now exploded, depending of the buying /
selling type and, different for taxes, total duty free and total taxes
included. This avoid the export template to be too complex.
Fix balance issue and wrong texts

http://www.igestis.org/redmine/issues/290
Fix issue : wrong invoice amount in into the lists

http://www.igestis.org/redmine/issues/290
Remove unnecessary sql
* New version.
Merge branch 'master-new-export-config' of https://github.com/olivierb2/igestis-commercial into master-new-export-config

Conflicts:
	debian/changelog
English text corrections
English text change
Fix the invoices export
Invoice export correction
Evolution #269

* Improve the provider invoice management.
* When we enter the same invoice numver as a previous one, we now have
the choice, to change, remove current one or view previous one.
* When importing two time the same file, we now have an error (based on
the md5 of the file).
* Changed the structure of the module to match with the new igestis
core standard. To expose only the public file (js, css, images)
Evolution #277 : Imprint and terms on invoices

The commercial module parameters allows now to add a general term and
imprint to the quotation and invoices
Anomalie #289 : Providers invoices amount association fixed

The duty free amount is now correctly calculated when you submit a
provider invoice amount with 0 taxes
Merge remote-tracking branch 'origin/dev' into 2.3