FromMdbValue for &str
FromMdbValue for &str

Allows to run with no allocations at all if correct
lifetimes could be deduced
tempbottle/lmdb-rs,dropbox/lmdb-rs,krakatoa/lmdb-rs,dropbox/lmdb-rs,frew/lmdb-rs,jedisct1/lmdb-rs,vhbit/lmdb-rs,tempbottle/lmdb-rs,frew/lmdb-rs,mneumann/lmdb-rs,krakatoa/lmdb-rs,vhbit/lmdb-rs,mneumann/lmdb-rs,jedisct1/lmdb-rs