Some design and functional bugs are fixed.

1. Images on the chat screen for reject and block user has been
implemented.
2. A check on email, confirm email, paypal address and home address has
been removed.
3. On item view controller, Buy this button has been disabled once user
buy the item successfully.
4. On Registration view controller some UI bugs on country picker has
been fixed.
5. On registration view controller, Done button has been implemented on
paypal textfield instead of confirm email textfield.
6. On Login screen when user enters some unambiguous data it was
showing some database error which has been exchanged by a static
response.