Merge pull request #15 from quandl/master

Merge back into develop
curl opts
curlopts properly added
Merge pull request #17 from quandl/master

Multisets defaulted to regular time series
done merge
push to version 2.3.5
Typo :grin:
typo
Multisets actually can have 1000 columns
This package actually requires R 2.15.0 for assignInNamespace
Merge pull request #19 from quandl/develop

Develop