Some tests for current known problems have been added in 0fdd241a (Add a
test to check whether update of a part of repeated elements works.,
2015-08-25) and ac8d33af (Add test to check whether insert-{before,after}
with same ids is working fine., 2011-12-16), but they never seem to have
passed. Mark them as expected failures for now.

this accidentally removed the assertions from test_insert_element_with_same_id

convert README as rst

So that it displays correctly in gitlab

See merge request !1

improve README

Remove zope.interface dependency
Use regular unittest

No change in API, no bug fix

- (Comments and PI as sibling)
- New nodes stay orphan.

by a modification. This patch address this issue.

with a unique identifier.

 * /erp5/object[@id='foo']/title
 * /erp5/object[@gid='2130123']/title

* Add tests