* dynamically resize lmdb
* rustfmt
* explicitly close db before resizing
* rustfmt
* test fix
* rustfmt
* pool tests
* chain fix
* merge
* move RwLock into Store, ensure resize gives a min threshold
* rustfmt
* move locks based on testing
* rustfmt
* headers msg is now "streamed" off the tcp stream
* rustfmt
* cleanup
* move StreamingReader into ser.rs
extract read_exact out into util crate
* rustfmt