lexibank/tls: CLICS 2.0

Release of this dataset for CLICS 2.0, where it is included.

Data comes from the "Tanzanian Language Survey (TLS)" as hosted at http://www.cbold.ish-lyon.cnrs.fr/Docs/TLSinfo.html and was gathered as part of a lexicostatistical survey of about 100 Tanzanian languages undertaken in the early 1970s by Derek Nurse, Gérard Philippson and a team from the Department of Foreign Languages and Linguistics of the University of Dar es Salaam. The source (paper) documents for these computer files were sets of printed forms, each set containing 1079 entries in parallel columns of Swahili and English. These forms were distributed to native Tanzanians for translation into the target Tanzanian languages.