Merge pull request #6 from guestisp/master

Some fixes on multipayments feature
Merge pull request #7 from guestisp/master

Fix invoice tab from customer detail page.
- invoice grand total style improved

Change-Id: Ica7f8145625c5d607a6d033101108554e77188fa
Signed-off-by: ShineISP <info@shineisp.com>
Experimental support for VAT exempt customers
Merge remote-tracking branch 'refs/remotes/origin/master'