- made db_ets:get_chunk more flexible:  * allow an additional filter  * allow a fun to define what part of the db_entry to return  -> only retrieve keys in delete_chunk_ before deleting them (more memory-efficient)
- made db_ets:get_chunk more flexible:
 * allow an additional filter
 * allow a fun to define what part of the db_entry to return
 -> only retrieve keys in delete_chunk_ before deleting them (more memory-efficient)
digshock/scalaris,tectronics/scalaris,digshock/scalaris,tectronics/scalaris,tectronics/scalaris,seyyed/scalaris,digshock/scalaris,seyyed/scalaris,digshock/scalaris,seyyed/scalaris,seyyed/scalaris,tectronics/scalaris,digshock/scalaris,seyyed/scalaris,tectronics/scalaris,digshock/scalaris,seyyed/scalaris,seyyed/scalaris,digshock/scalaris,tectronics/scalaris,tectronics/scalaris