refactored for /app_simpleDemo to be more streamlined and easier to set
up configuration from scratch; did this by moving all needed define()
calls into one block at top of app_cfg.php.

Cleaned up files in app root and moved those to /_resources

Improved table name for post model

Moved localInit() logic into app_cfg.php so that: a) it can be reused
elsewhere - eg, helper_db.php, b) access.php become very light