Version bump to 1.1.0

Update changelog

Rubocop fixes.

Version bump to 1.0.3

Merge pull request quandl#4 from quandl/AP-378/package-improvements

Ap 378/package improvements

Merge pull request quandl#3 from quandl/AP-352/add-request-headers

add request source and version headers

Version bump to 1.0.0