* Axai.sln: new project changes

* ContactForm.xaml: Changed colors in order to standarize Android and
  iOS apps theme

* ContactForm.xaml.cs: Add Validation for the Contact Form and sending
  method

* MemberViewModel.cs: Change uri from canek to axai

* PortfolioProjectViewModel.cs: change uri from canek to axai

* FormPost.cs: Moved to ContactForm.cs