Added amount field to projects and enforced time constraints

Added amount field to represent the sum of money expected for the
project to be successful.

Added extra tests to verify that all the required fields are filled in
and that the expiration date does not preceed the creation date.
Parse SQL Datetime

The ORM now cast the SQL DateTime to go Time
Create a template function to perform the number left days of a project

Create the dayLeft template function which performs the number of days
before the end of the project
List all projects
Redirect to the project page after the creation