* resetIH from scratch if needed
* lmdb
* add AbstractKV to loader, added new Object accessor around AbstractKV
* add lmdb cli flag
* add requirement of k!=nil on error in docs
* add Size method for compatibility
* read after put tests
* fix multiput nils
* simplify loops
* increase mmap size
* better error messages
* better error messages
* fix tests
* better error messages
* cleanup
* avoid bolt usage in test
* move hardcoded bucket name to dbutils
* register more buckets
* register more buckets
* fix test
