Upgrade websharper, simplify internal build [skip ci]
Update MouseChase to use new CSS API
Move samples site to WebSharper.UI.Next
Add changes to project
Add descriptions to samples
Add Flowlet examples

Flowlets allow for different sub-UIs to depend on each other.

This commit adds a small example for this.
Updates on Flow usage [skip ci]
Fix / style ContactFlow

Update ContactFlow to use the latest Flow API, and add Bootstrap styling.
Merge branch 'master' of https://github.com/intellifactory/websharper.ui.next

Conflicts:
	src/ContactFlow.fs
Add InputTransform example.
Remove reference to MessageBoard
Add mini sitelet example
Refactorings, documentation, URL to specify first example

* Documented ContactFlow
* Allow initial example to be specified using # in URL
* Add URLs to each example file (address issue #1)
* Refactor out helper functions into Utilities.fs
Add MessageBoard sitelet example

Also change MiniSiteletTest to use MiniSitelet now integrated into main UI.Next library.
Re-trigger CI
A bit of MessageBoard refactoring.
Merge branch 'master' of github.com:intellifactory/websharper.ui.next
Add u/p hint back
Add faux-async backend for MessageBoard

Also address some issues from #1.

    * Fix some of the styling issues
    * Add some things into Utilities (creating a style, link with callback)
    * Server-like async backend, some necessary refactorings
Updated to latest API