On update after replacing with a new instance of a component

Fix examples in readme

Fix tests for components

Components implementation

Use `peekable` to check if filtered iterator is none or not

Use `all` method to prevent allocating vector in `todomvc` example

use (no_return) optimization on js! macros

Add prelude module

Shows how to send a message to a parent scope

Use typed Request/Response objects in Fetch Service

Fix entry text removal on enter in todomvc, add onblur event

Allow to have callbacks in properties. It's not finished,
because callback should send messages ...

Reasons:
1) Better perfomance
2) User not forced to use serde crate
3) The only one way to send ...

Properties work not so fast because we should use pool of calls for
components update (now `setT...

Also PartialEq implementation was added

It works on component initialization only.

Allow html attributes with dash

And remove Default trait requirement.

Models were not split into multiple small components

Method new expects ownership to a unwrapped context instance

According to the upgrading of counter demo

Bump version to 0.3.0

Add mount points

Fix typos

But not for events

Fix a bunch of typos

Run tests in headless Chrome for Emscripten backends

This makes it possible to write tests which use browser-only APIs.

Use storage in TodoMVC example

Update README.md

fix four examples -> seven examples

Bump `stdweb` to 0.3

Fix npm_and_rest demo

ccxt service only, gavatar doesn't work because of Cross-Origin Blocking

Add scenes to crm example

Also fixes #67 bug

Add explanation to response types of the dashboard example

Add App type which supports a user-defined context

Implement PartialEq for VTag