Check if a record is existed or not before saving
upgrade rails to 4.1.7, ruby to 2.1.4
update annotate info
add gem: rack-mini-profiler
add gem: sec_statement_parser
1. add gem: railroady (show graphic model relationship)
2. add .editorconfig
Add us_stocks controller
Finish google finance parsing
add gem: nikkou & pry-byebug
GoogleFinanceParse: provide merged data
tmp commit
new model: StandardItem
new model: ItemStandardItemPair
1. add column to statements: end_date (fiscal period end date of a statement)
2. statements' quarter can be null
new model: ItemStandardItemPair
1. add column: namespace to items
2. minor changes in validation
Remove uniqueness check from database
rename exact_match to is_exactly_matched
Refine uniqueness validation
Finish basic implementation of US market