support maps with and without .map extension, rename to .map on save
*** empty log message ***
overwrote decay_objects
- introduce cf::attachable::thawer_merge, allowing classes to overwrite what happens when two objects get merged. - protect some extension data with it - make unlink_save blocking, so we do not get needless reset loops because of slow disk response.
re-bless in case extensions have been reloaded
fixes, starting to look good again
WARNING: this release is BROKEN - rewrote map handling. map types are now completely pluggable, maybe *too* pluggable, as everything is a plug-in now. - mark mandatory extensions as such. - handle overloaded attachable objects correctly. - many minor changes.
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