add 'mysql_enable_utf8' option to DBI
add test(passed)
add DBI->connect error handler
escape input value
update README
tweak
add .travis.yml
fix .travis.yml
fix .travis.yml
update README
add test version perl5.14 for travis-ci
add column 'created_at' and 'updated_at' to DB
create Service layer which acccess to DB