Adding score model
Adding smell model
Add polymorphic relationship to score and smell migrations
Refine score and smell model relationship
rm decapreted score model files
refine report relations
Merge branch 'master' into abstract_score
Add graph module to graph_helper.rb
Resolve conflict
Fix targetable varbiable to symbol
Create migration files for adding report_id field to score and smell
Rename columns name in score and smell
Refine relationships
rm old scores spec and migrations
Refine score and smell model
Adding score category model
Delete migration files related with old score model
Add name to ScoreCategory
Add source category and define relations
add smell_category