Is this project still active?

[jtejido]

Hi,

I'd like to thank you for having this in Go especially since it's not always an option for me to use JVM at work, so this is a good option to have.

I've continued to add similarity models here and then some, which wasn't and isn't part of Lucene, and will continue to add learning-to-rank feedback models, but before that, it looks like I've hit a snag when testing some simple things.

First one is, it doesn't seem to flush some old index files when I added a three word doc to the index like 'this is test'; It shows some flushing error in the terminal (it deleted the .nvd and nvm file though).