open file for nokogiri after checking of gfs, instead of 'before'
Move parser from controller to rake task
1. remove database.yml from version control
2. add pg gem in development
1. skip item with value 0
2. increase max file size to 30MB
3. set starting_alphabet to nil if there is no such argument
sort path
skip when error in statement path
minor process flow refine
output starting time
wording
new model: ItemStandardItemStatementPair
Merge branch 'feature/item_standard_item_statement_pair' into develop
handle SIGINT/SIGTERM
update .gitignore
Merge branch 'develop'