Deprecated month/year, use expiry instead
Added tests for Options
@network now catches connectivity problems
Remove superfluous parentheses
Doc for pandas.io.data
Examples for all datasources
DOC: reformat io.rst/data reader
Merge pull request #3822 from gliptak/googleoptions

Change Finance Options signatures and deprecate year/month parameters
ENH: raise a more a useful exception on empty files
Merge pull request #3989 from cpcloud/empty-csv-fix

ENH: raise a more a useful exception on empty files