Support for normalizing column names.

[pudo]

This still has the dependencies, since I can't come up with an alternative way of actually doing the normalisation.

Fixes #396, replaces #505.

[danvk]

Is there any interest in reviving this? I'd love to be able to run:

csvsql --db '...' --insert *.csv

to import a collection of CSVs into Postgres. But my CSVs have a capitalized header row, which means I'll need to do some monkey-patching to get easy-to-work-with tables in Postgres.

(Update) In case it helps anyone else, you can lowercase all column names in a Postgres database after you import using this magical incantation from Stack Overflow:

\t on
select 'ALTER TABLE '||'"'||table_name||'"'||' RENAME COLUMN '||'"'||column_name||'"'||' TO ' || lower(column_name)||';' 
from information_schema.columns 
where table_schema = 'public' and lower(column_name) != column_name
\g /tmp/go_to_lower
\i /tmp/go_to_lower

[jpmckinney]

Closing as diverged too far. Leaving #396 open.