Support for custom activities about fitbit-googlefit HOT 1 OPEN

Hi @praveendath92,

I've double checked the Fitbit app names. They are written exactly so:

• Aquagym, calistenica in acqua
• Acqua jogging
• Qi Gong
• Tai chi
• Yoga, Ashtanga

I've created on Fitbt app 5 fake activities, one per type. Every fake was logged for one hour.
Then I've launched app.py with my convertors (and correct activities names).
Terminal output ended with 5 activities in sync.
GoogleFit logs only 2: Tai chi and Qi Gong (both under Yoga).

My convertor.py changes are:

[...]
		elif activity['activityName'] in ('Yoga, Ashtanga','Qi Gong','Tai chi'):
				activityType = 100
		elif activity['activityName'] in ('Acquagym, calistenica in acqua','Acqua jogging'):
				activityType = 21
[...]

from fitbit-googlefit.