moved everything into /trunk/ to create the standard svn layout, for use with tools that require this (eg. git-svn). IMPORTANT: do NOT do an `svn up`. instead, re-use your working copy's existing files with `svn switch` (http://svnbook.red-bean.com/en/1.6/svn.ref.svn.c.switch.html).

cols: Support CSVs without a header, such as intermediates that become unmapped_terms.csv, new_terms.csv

cols: Removed special handling of '+' because list_subset() now handles this col_num value itself, by appending the rest of the columns. Support intermixing int and '+' columns, by using new format.str2int_passthru().

cols: Changed value for all columns to '+' so that it wouldn't need to be shell-escaped as '*' was

cols: If column number of "*" given, get all columns

Added cols to select columns from a spreadsheet