Change log message type.
Add print statement for debuging.
Remove raise AdsAPIError.
Revert "Remove raise AdsAPIError."

This reverts commit 188509d0dade9f7ae8ba0a16a79ae229374ef768.
Add additional info in AdsAPIError exception.
Add new api for supporting new campaign structure of facebook.
Fix some syntax error.
Add new api for supporting new campaign structure of facebook.
Add to support time_interval parameter of get_adreport_stats method.
Add new method for making batch request with label.
Fixes some warning and error.
Add new functions for support async request of adreport stats api.
Remove workaround code and remove unnecessary method.
Modify method name for supporting backward compatibilities.
Modify some comments and test code for supporting backward compatibilities.
Modify make_request method for supporting 'DELETE' request method.
Add new method for getting stats of adcampaign group.
Merge pull request #3 from taenyon/update

Add new api for supporting new campaign structure of facebook.
Bump version.
Define common data limit value for quering facebook data.