ADDED conversation & message model unit test pseudocode
UPDATED conversation and message test codes
Merge remote-tracking branch 'origin/master' into conversation_test_cases
MOVED conversation_spec to spec/models folder
Merge remote-tracking branch 'origin/master' into conversation_test_cases
REMOVED god damn libv8
Merge remote-tracking branch 'origin/master' into conversation_test_cases
UPDATED before_each and created_for test in conversation_spec
ADDED conversation model
ADDED presence validation to conversation created_for
ADDED created_by validation and test case
UPDATED message_spec to test correct model
ADDED conversation reference to message
UPDATED relationship between conversation and message
Merge remote-tracking branch 'origin' into conversation_test_cases
UPDATED message so that it will update conversation's updated_at; UPDATED test code for this functionality
ADDED validation to converstaion so that created_for and created_by cannot be the same
ADDED validation to prevent creating duplicated conversation
REMOVED redundant test
UPDATED test description