Should we pass `?limit=0` when hitting the table endpoint, knowing that it is the default?

[dmonroy]

In a recent conversation with @malecki he mentioned that default value for limit parameter in querystring for /table/ endpoint is 0. We went to this conversation by looking at the problem that I described in #363.

When loading variables from table endpoint we are being explicit with the limit parameter, setting it to 0:

scrunch/scrunch/expressions.py

Lines 430 to 432 in f4830cb

	table = ds.follow("table", urlencode({
	'limit': 0
	}))

I know someone would say that Explicit is better than implicit, and I will usually agree with that if it wouldn't be that it seems to be causing the problem I described in #363, so we must either remove the default value or prevent it from causing problems.