Please add liblmdb

[eudoxia0]

This is a low-level binding to the LMDB key-value database.

https://github.com/antimer/liblmdb

[quicklisp]

Doesn't build for me due to redefining non-EQL constant: http://report.quicklisp.org/2016-03-18/failure-report/liblmdb.html

[eudoxia0]

I think it's fixed now.