readium/readium — pull request #276 by artm (2013-04-12 21:55:21+00:00)
Title: prevent dubplicate manifest item ids

this prevents generation of duplicate item ids when manifest item ends in
number. inserting an underscore makes sure that new id's stay unique
(e.g. html2 pos 26 and html22 pos 6 will become html2_26 and html22_6
instead of both html226)

fixes #262