Don't crash if there is no argument to frequency model.
Don't return a reference to the head of something destroyed.
Add some tests for smodel arguments.
Bump the autoconf requirement dwn to 2.68.
Require a recent libtool.
Use autoconf to require c++11.
Add broken-out Demo files.
Don't crash trying to skip more rows than there are.
Allow requiring a minimum number of rows.
Fix detection of decreasing variables...
Factor out function show_mean( ) from show_stats( ).
Factor out show_log_mean( ).
Factor out show_median( ).
Add mode( ) function to statistics.{H,C}
Report errors for a variable.
Allow computing multiple confidence levels simultaneously.
Merge branch 'master' of github.com:bredelings/BAli-Phy

Conflicts:
	src/tools/statreport.C
Add option to print the mode (estimated).
Update.
Allow printing NA for the mode.