These three files are used as entry points into the project, and we
expect people to be importing them directly so they are at the top level
for convenience. Because of this, they have not been getting run through
Babel like the rest of the code here, so they were using older syntax.

In this commit, I am moving these files into the src directory so they
will be built into lib like the rest of the code here. In their place at
the top level, I am creating some very light shims that simply bring in
the built version of the module and re-export it if necessary.

This gives us a couple of advantages. First, it makes more of our code
consistent. Second, it makes it possible to produce two different kinds
of builds, one for CommonJS consumers and another for ES modules
consumers.

Replace svg-loader with babel-plugin-inline-react-svg

Remove unused classnames dependency

Update consolidated-events usage to newer API

I want to do some optimizations on how react-dates is built, to help
reduce the bundle size impact of using this project. The first step I
see is reducing the size of each of the components, which we can achieve
by avoiding building them with webpack.

From what I can tell, webpack was only brought in to support getting
SVGs in these components. We can pretty easily replace this with a Babel
transform that will achieve the same result, but with less complexity in
our build, and a little less overhead in the resulting components.

Before this change:

```
~/react-dates ❯❯❯ du -hs lib/components
420K    lib/components
```

After this change:

```
~/react-dates ❯❯❯ du -hs lib/components
348K    lib/components
```

In v1.1.0, addEventListener returns a function that can be called to
remove the event listener.

https://github.com/lencioni/consolidated-events/blob/master/CHANGELOG.md#v110

Fix some apparent a11y issues with react-dates

add verticalHeight prop for DayPicker

Fixed RTL navigations

Fix documentation theming spread

 - https://github.com/angus-c/just/issues/70
 - https://github.com/istanbuljs/istanbuljs/issues/110

[Dev Deps] update `sinon`, `moment`, `karma-webpack`, `eslint`, `eslint-config-airbnb`, `eslint-plugin-import`, `eslint-plugin-jsx-a11y`, `eslint-plugin-react`, `enzyme-adapter-react-15`, `enzyme`, `cross-env`, `coveralls`, `chai`, `babel-plugin-istanbul`, `aphrodite`

See https://github.com/istanbuljs/istanbuljs/issues/110

See https://github.com/angus-c/just/issues/70

See https://github.com/angus-c/just/issues/70

Bump react-with-styles-interface-css version

For for Issue #713 Unavailable Date phrase not reading on Screen Readers

Fix for Issue #713 by updating the way in which modifiers is checked for existence of the BLOCKED_MODIFIER now that modifiers is a Set and no longer an object.

Add missing customCloseIcon prop/usage to SingleDatePicker.

Update react-with-styles-interface-aphrodite to the latest version 

Add eslint-plugin-react-with-styles, add root: true to .eslintrc

This will help prevent eslint from getting confused if there is a
.eslintrc in a higher directory.

These eslint rules will help protect this project from bad
react-with-styles usage.

Changes css style specificity to 0