added first draft of batch commands
service now saves Token not string in header to allow later retrieving
(ie. by a batch callback function)
TODO file
requirements moved to root of project
first tests
todo, minor fix in convert_key
added parameter to ignore certificate errors (google API servers often
provides invalid certificate when called from my machine)
New DailyLimitExceededException
SavedCall helper
simple way to repeat fetch if it fails
added DailyLimitExceededException and validate_certificate named
parameter
requirements
removed swap files added by accident