Fixes and adding new code

1. Added Email notfication for user and admin when new user registers
2. Fixed error when user register and send quote at the same time for
general quote. Haven tested for normal quote.
3. Added ajax approve and cancel reservation from the admin panel. Ajax
works however the reservation and cancel doesnt work because of function
wp_post_delete()
4. Fixed function upload for quote design work. Supported bmp, jpeg,
png, ai, psd, pdf.
5.  Fixed some bugs in the validation function for signup_validator,
quote_validator, general_quote_validator