Enable the feature to snapshot the pacakges

[vinitkumar]

Since the packages names are hardcoded in the code, it will be really hard to keep it updated. Instead of this something like this could work

- packges.txt
- autoupdate_packagelist.sh

The packages.txt would be a textfile containing all the installed packages. And the second script contains the script to get all the installed packages at the moment and then pipe the output to the packages.txt

If you do something like this, it means the install script will basically be a for loop iterating over the list of the packages and would be much cleaner and nice experience.

It can also be called using a cron job so that the latest is updated daily and the system is snapshotted periodically.

[shubhampathak]

Thanks Vinit, will work on it.