refactored can_start? to make available methods for finding dependent_assessment
refactored can_start? to make available methods for finding dependent_assessment

allenwq/coursemology.org,nnamon/coursemology.org,nnamon/coursemology.org,dariusf/coursemology.org,nnamon/coursemology.org,allenwq/coursemology.org,allenwq/coursemology.org,nnamon/coursemology.org,dariusf/coursemology.org,nnamon/coursemology.org,dariusf/coursemology.org,Coursemology/coursemology.org,allenwq/coursemology.org,dariusf/coursemology.org,Coursemology/coursemology.org,dariusf/coursemology.org,Coursemology/coursemology.org,Coursemology/coursemology.org,Coursemology/coursemology.org,allenwq/coursemology.org