Adds .gitignore file to exclude private data from sad-data folder.
Merge remote-tracking branch 'upstream/master'
Adds spab files for BBS, FIA, Gentry, and MCDB data from White et al. 2012 paper.
Adds raw data import function to sad-comparisons script, adds comment to start model comparisons function.
Updates comments in data files for replicating the SAD comparisons from this repository.
Merge pull request #6 from embaldridge/master

Adds .gitignore file to exclude private data (NABA and CBC) from data repository, adds spab files for remaining data.