added the languagechoose menu in mainpage

its disabled: it switches to language.xaml
Merge branch 'master' of https://github.com/rvnijnatten/WeBreda

Conflicts:
	WeBreda/WeBreda/MainPage.xaml.cs
Merge branch 'master' of https://github.com/rvnijnatten/WeBreda
Merge branch 'master' of https://github.com/rvnijnatten/WeBreda

Conflicts:
	WeBreda/WeBreda/MainPage.xaml
	WeBreda/WeBreda/MainPage.xaml.cs