--Fixed most backend site logic error.
--Implement backend site login sepration.
-- Added in DB testing data.
--Made a extension to add TinyMCE editor for business administrator easily editting the website content.
--Implement PBKDF2 hashed pwd storing.
TODO: slider management.
front-end login
front-end shopping cart
backend logic finalization

Signed-off-by: qiansen1386 <qiansen1386@gmail.com>