Update Paymentitem.php

Bug fix to allow comma-separated values with decimals when modifying
amount of each request.
Revert "Removed config files"

This reverts commit d2dfcd61eccc0351759a8617a8417af2168e9375.
Merge branch 'master' of https://github.com/dost-onelab/ulims
Removed config file
Removed main.php
Merge pull request #1 from dost-onelab/master

Pull Request