Remove f and χ^2 distributions; split wishart to its own file.
Clean up apop_data(get|set|ptr)
apop_name_find searches via strcasecmp, not regexes. [next stop: hashes?]
MLE path tracing overhaul
change apop_plot_histograms to use gnuplot's impulses, not boxes
multinomial probit fix
added append option to apop_text_to_db

Also, commented out Wishart distribution until it confidently passes tests.
transpose in place
siman checks that starting point meets constraints
sundry documentation and typo fixes
with assignment of observations to most-likely component
seems to run
Derek's likelihood function works