add missing resource "admin.seach". Fix #951

modified :
    setup/insert.sql
    setup/update/2.0.5.sql
allow to not save the current url as a previous url. Fix #903 and #982
update changelog
Merge pull request #991 from lunika/fix_2.0

Fix 2.0
'freesans' is now the default font of PDF documents

Conflicts:
	core/lib/Thelia/Action/Pdf.php
	core/lib/Thelia/Core/Event/PdfEvent.php
Merge pull request #994 from lunika/fix_2.0

'freesans' is now the default font of PDF documents
Too much '}'
Merge pull request #999 from InformatiqueProg/patch-5

Too much '}'