BlocklyXmlBuilder refactoring
BlocklyXmlBuilder refactoring

vlfedotov/django-business-logic,dgk/django-business-logic,vlfedotov/django-business-logic,vlfedotov/django-business-logic,dgk/django-business-logic,vlfedotov/django-business-logic,dgk/django-business-logic,vlfedotov/django-business-logic,dgk/django-business-logic,dgk/django-business-logic