init thank shop feature
remove warning of zinnia during the test
init thankshop lettuce test
remove poster step because it is not clear enough
Merge branch 'develop' into thankshop
finish first basic getting thank points

getting thank point on daily login
finish basic thank point required on thanking
finish prevent spam thank
[r] modify test to make the lettuce test pass when run all at once
:Merge branch 'develop' into thankshop

Conflicts:
	tangthuvien/settings.py
add paypal rest api packagge
finish allow use buy thank points via paypal payment
store paypal config in settings
use built absolute url to get return address for paypal
implement step i has thanked points
change daily login history using django timezone
implement shop inventory step
add item model for thankshop
add homepage template for thankshop
init shop homepage view