Invoicebuddy

* Fixed an issue where automatic calculation of the total fails sporadically when filling up an invoice or a proposal
* Version bump to 0.2.22

* Customer name now shows up along with the proposal number in the description field of the modal when trying to mark proposals as accepted or rejected
* Customer name now shows up along with the invoice number in the description field of the modal when trying to mark invoices as paid or canceled
* Invoices and proposals are now sorted by default in descending order of their respective numbers
* Version bump to 0.2.21

* Added search capability on the items page
* Added search capability on the customers page
* Version bump to 0.2.20

* Added ability to specify decimals in the item quantity field
* Version bump to 0.2.19

* Added ability to include negative amounts for items in an invoice or a proposal
* Version bump to 0.2.18

* Improved handling of templates
* Version bump to 0.2.17