Rename libmdb to liblmdb

libraries/liblmdb/.gitignore

libraries/liblmdb/COPYRIGHT

libraries/liblmdb/Doxyfile

libraries/liblmdb/LICENSE

libraries/liblmdb/Makefile

libraries/liblmdb/lmdb.h

libraries/liblmdb/mdb.c

libraries/liblmdb/mdb_copy.c

libraries/liblmdb/mdb_stat.c

libraries/liblmdb/mfree.c

libraries/liblmdb/midl.c

libraries/liblmdb/midl.h

libraries/liblmdb/mtest.c

libraries/liblmdb/mtest2.c

libraries/liblmdb/mtest3.c

libraries/liblmdb/mtest4.c

libraries/liblmdb/mtest5.c

libraries/liblmdb/mtest6.c