Administrative scripts and better export scripts

by Pallav for Association Tatoeba

The aim of this project is to write clean administrative scripts that could ease the task of setting up a development or production server from scratch and also automate basic administrative tasks such as backup, restore, import, export, etc. It also includes writing certain other scripts that perform important tasks specific to the website. Along with this the project deals with improving the existing export scripts so as to include certain important features that are currently missing.