CFY-1363 added nested properties to get_property and get_attribute
CFY-1363 use better separator string for representing unique function ids in circular calls validation
CFY-1363 use better separator string for representing unique function ids in circular calls validation
Merge pull request #28 from cloudify-cosmo/CFY-1363-nested-get-property

CFY-1363 added nested properties to get_property and get_attribute