20160810: 

In peek, make number of missings show in histogram for
numeric variables.

2016-03-03

Create .gitignore file, ignore backups, etc.
Make gitignore ignore kutils.gitex and anything
else we are sure we don't want to track.

Teach team how to use ChangeLog.

insert the SEM table code.

clear up roxygen markup for imports and importsFrom


