[imp] added destroyable mixin
[imp] added destroyable mixin

splbio/openerp-web,gisce/openerp-web,splbio/openerp-web,gisce/openerp-web,gisce/openerp-web,MarkusTeufelberger/openerp-web,MarkusTeufelberger/openerp-web,MarkusTeufelberger/openerp-web,splbio/openerp-web