Add main webzash sqlite database structure

Signed-off-by: Prashant Shah <pshah.mumbai@gmail.com>
Add default 'admin' user with 'admin' password

Signed-off-by: Prashant Shah <pshah.mumbai@gmail.com>
Custom helper for displaying flash messages

Signed-off-by: Prashant Shah <pshah.mumbai@gmail.com>