show short help with -h (#76)

cmd/shortusage.go

@@ -0,0 +1,16 @@
+package cmd
+
+const shortusage = `tablizer [regex,...] [-r file] [flags]
+-c col,...   show specified columns                -L  highlight matching lines
+-k col,...   sort by specified columns             -j  read JSON input
+-F col=reg   filter field with regexp              -v  invert match
+-T col,...   transpose specified columns           -n  numberize columns
+-R /from/to/ apply replacement to columns in -T    -N  do not use colors
+-y col,...   yank columns to clipboard             -H  do not show headers
+--ofs char   output field separator	               -s  specify field separator
+-r file      read input from file                  -z  use fuzzy search
+-f file      read config from file                 -I  interactive filter mode
+                                                   -d  debug
+-O org -C CSV -M md -X ext -S shell -Y yaml        -D  sort descending order
+-m  show manual       --help  show detailed help   -v  show version
+-a  sort by age       -i      sort numerically     -t  sort by time`