[web] allow configuration of the Content-disposition value
The `set_content_type` function now takes and optional `disposition` parameter
to control the value of this HTTP header.
Use of `Content-disposition: inline` with a filename parameter are valid, so
the presence of filename does not allows to choose between `attachment` and
`inline`
# some entities have been added before schema entities, fix the 'is' and
# 'is_instance_of' relations
for rtype in ('is', 'is_instance_of'):
sql('INSERT INTO %s_relation '
'SELECT X.eid, ET.cw_eid FROM entities as X, cw_CWEType as ET '
'WHERE X.type=ET.cw_name AND NOT EXISTS('
' SELECT 1 from is_relation '
' WHERE eid_from=X.eid AND eid_to=ET.cw_eid)' % rtype)