Replaced Init and Start with Initialize method

[mvanbeusekom]

✨ What kind of change does this PR introduce? (Bug fix, feature, docs update...)

Feature - update the MvvmCross Starter Pack code to make use of new MvvmCross 5 features.

I am wondering if I should also already inject the MvxNavigationService into the MainViewModel, it will not be used directly but changes are that most people will do navigation from here. And it will be a nice introduction to the new navigation service.

⤵️ What is the current behavior?

In the current version the generated MainViewModel uses the Init and Start methods to initialise the viewmodel.

🆕 What is the new behavior (if this is a feature change)?

Use the new Initialize method to allow for async support.

💥 Does this PR introduce a breaking change?

Nope (if released with version 5.0.1 or later). Earlier versions don't call Initialize from the AppStart method.

🐛 Recommendations for testing

See breaking change.

📝 Links to relevant issues/docs

none

🤔 Checklist before submitting

• All projects build
• Follows style guide lines (code style guide)
• Relevant documentation was updated (docs style guide)
• Nuspec files were updated (when applicable)
• Rebased onto current develop

[Cheesebaron]

Spacing seems odd here

[mvanbeusekom]

Those tabs get me every time, apologies. They are corrected. Squashed and forced push changes.