Allow user to bypass the condition regarding number of workouts in json and zip

[Ioannis Kosmidis]

[Ioannis Kosmidis]

Use the data field in JSON, e.g. from {a3ccd92b-87f0-422d-adb7-91ab3e6021aa}.json

	{
		"date":"2016/11/01 06:10:21 UTC",
		"data":"---------------",
		"sport":"",

		"METRICS":{
			"ride_count":"1.00000",
			"workout_time":"6300.00000",
			"time_riding":"6300.00000",
			"total_distance":"25.60000",
			"athlete_weight":"87.00000",
			"total_work":"1418.00000",
			"average_speed":"14.00000",
			"average_power":"224.00000",
			"average_hr":"155.00000",
			"hrpw":"1.44516",
			"ap_percent_max":"22.40000",
			"average_cad":"76.00000",
			"average_temp":"-255.00000",

See, also https://github.com/GoldenCheetah/GoldenCheetah/wiki/FAQ-DATA#what-do-the-letters-mean-in-the-data-field for more info