The motivation behind this is that SQLite libraries and function names have always been versioned, and they ought to versioned to play well with multiple SQLite installations. Eventually, the functions extension will have to be ported to [SQLite4](http://sqlite.org/src4/doc/trunk/www/design.wiki), and since the file name is not versioned, it will conflict. I did this change; so, that there is a standard for future SQLite extensions added in Homebrew: `libsqlite<version>-<name>`.