LDA noise removal/topic and wiki naming; pipeline tar efficiency improvement; exception handling

I realized I never merged the LDA stuff, so here are a bunch of changes at once, sorry.

Includes the LDA noise removal, LDA topic naming, and wiki subject naming scripts.

Also added to top-wiki-topics-lda.py and changed the way CSV files were written in an attempt to optimize the Euclidean distance calculation.

query_tar.py performance is improved by only chronologically sorting text files when the text queue is exhausted.

General exception handling elsewhere, mostly so things don't terminate when empty lists are encountered.