Add comments to DBI options
Add a class for utility methods
Use MySQL instead of SQLite
Util: Add a method that reads entire files with one call
Use 'board_amon2_test' table for test environment
Use 'board_amon2' table for development environment
Remove a needless line

Because: 'db/test.db' is not created so far.
Add options when DBD::mysql connects to MySQL
Merge pull request #1 from oguro1021/from_sqlite_to_mysql

Use MySQL instead of SQLite