Moving search functionality to LibraryContainerView

### Purpose

Create LibraryContainerView. This View will include `Library` label, Search textbox and LibraryView or LibrarySearchView. So `Library` label, Search textbox is the same for both views: LibraryView and LibrarySearchView. 

`LibraryView` is used for regular view.

`LibrarySearchView` is used for Search.

Let's take a look on left sidebar with `LibraryView`.
![001](https://cloud.githubusercontent.com/assets/8158551/4007959/be982a3c-29ce-11e4-8759-2e9b2c15e578.PNG)

For case of `LibrarySearchView` we will have this view of left sidebar.
![002](https://cloud.githubusercontent.com/assets/8158551/4008003/ba5ca78a-29cf-11e4-9568-7adc222bd532.PNG)

### Modifications

It is created `LibraryContainerView.xaml` and `xaml.cs` files. There copied UI from `SearchView` connected with Search. Event handlers are grouped and renamed by schema `SomeControlSomeAction`. Code isn't almost changed.

At some point current SearchView will be deleted.

The idea of this container to have search and switch between `LibraryView` and `LibrarySearchView`.

### Reviewers

@Benglin, please take a look.