estatapi 0.4.0

Major Changes

estat_getStatsData() and estat_getStatsList() has been overhauled. Accordingly, each function returns the result with different colnames than before. I’m sorry, but this change was inevitable to fix bugs like #7… For the details, please see this gist.
Treat most of parameters as formal arguments. Please be careful if you use unnamed arguments.
Use e-Stat API version 2.1, which is released on Jul 14, 2016.
estat_getStatsData() automatically repeats fetching records when the records are more than the number that can be fetched at one time (=100,000 records). You can stop this behaviour by specifying limit or .fetch_all argument.
Add getDataCatalog(), which finds statistical dataset files (Excel, CSV and PDF) and databases.