* [API]: add OY_ALLOW_DUPLICATES profiles selection flag

It disables the by default enabled filter to idetect and
skip different profile objects for one Profile ID.
* [sources]: support OY_ALLOW_DUPLICATES in oyProfiles_Create()

The new default behaviour is to skip duplicate profiles ID's.
* [tools]: add --duplicate option to oy-profiles

update deutsch
* [docu]: point oyOptionChoicesGet() to docu of new flag