Bump version to 1.9. This is a development version
Merge changes from 1.8.5
We're going to skip version 1.9
Initialize the new directory structure
Move PHP classes to lib/ directory
Move remaining PHP files to lib/ directory
Move indexer scripts to lib/ directory
Rearrange class files and set up autoloader
Migrate common functions and download script to new class structure
Initial implementation of generic Zip wrapper
Initial implementation of road name parser class
Update schema for MySQL
Finished implementation of road name data loading
Add parser classes for juso, jibeon, and extra_info
Fix schema to use separate integer ID column
Use object-oriented style for returned lines
Add parser classes for P.O.Box and detailed building info
Fix required column count
Add class for parsing English aliases
Add ability to handle Zip archives with multiple files inside