Add broken-out Demo files.
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