Clean and reorganize dev tools

dev/examples/mail/dolibarr_mail_attachementHTML.txt

dev/examples/mail/dolibarr_mail_attachementwithimageHTML.txt

dev/examples/mail/dolibarr_mail_simple.txt

dev/examples/mail/dolibarr_mail_simpleHTML.txt

dev/examples/mail/dolibarr_mail_universal.txt

dev/examples/mail/dolibarr_mail_withimageHTML.txt

dev/examples/mail/source_email_from_thirdparty.txt

dev/initdemo/removeconfdemo.sh

dev/resources/cliparts/commons.svg

dev/resources/dbmodel/dolibarr.uml

dev/resources/dbmodel/dolibarr.umldi

dev/resources/dbmodel/dolibarr_schema.mwb

dev/resources/iso-normes/GURULABS-RPM-GUIDE-v1.0.PDF

dev/resources/iso-normes/address_format.txt

dev/resources/iso-normes/banknumber_format.txt

dev/resources/iso-normes/barcode_EAN13.txt

dev/resources/iso-normes/countries_iso-3166_en.txt

dev/resources/iso-normes/countries_iso-3166_fr.txt

dev/resources/iso-normes/currencies_iso-4217.txt

dev/resources/iso-normes/fichier_norme_AFB-CFONB.pdf