docs(select): add basic readme (#2438)

Closes #2148

Author: kara

src/lib/select/OVERVIEW.md

@@ -1,8 +1,43 @@
 `<md-select>` is a form control for selecting a value from a set of options, similar to the native
-`<select>` element.
+`<select>` element. You can read more about selects in the 
+[Material Design spec](https://material.google.com/components/menus.html).
 
 <!-- example(select-overview) -->
 
-### Use with `@angular/forms`
-`<md-select>` is compatible with `@angular/forms` and supports both `FormsModule` 
-and `ReactiveFormsModule`.
+### Simple select
+
+In your template, create an `md-select` element. For each option you'd like in your select, add an 
+`md-option` tag. Note that you can disable items by adding the `disabled` boolean attribute or 
+binding to it.
+
+*my-comp.html*
+```html
+<md-select placeholder="State">
+   <md-option *ngFor="let state of states" [value]="state.code">{{ state.name }}</md-option>
+</md-select>
+```
+
+### Getting and setting the select value
+
+The select component is set up as a custom value accessor, so you can manipulate the select's value using 
+any of the form directives from the core `FormsModule` or `ReactiveFormsModule`: `ngModel`, `formControl`, etc.
+
+*my-comp.html*
+```html
+<md-select placeholder="State" [(ngModel)]="myState">
+   <md-option *ngFor="let state of states" [value]="state.code">{{ state.name }}</md-option>
+</md-select>
+```
+
+*my-comp.ts*
+```ts
+class MyComp {
+  myState = 'AZ';
+  states = [{code: 'AL', name: 'Alabama'}...];
+}
+```
+
+#### Keyboard interaction:
+- <kbd>DOWN_ARROW</kbd>: Focus next option
+- <kbd>UP_ARROW</kbd>: Focus previous option
+- <kbd>ENTER</kbd> or <kbd>SPACE</kbd>: Select focused item

src/lib/select/README.md

@@ -1,3 +1,68 @@
-## Work in progress!
+# md-select
 
-The select is still a work in progress, so most features have not been implemented. Not ready for use!
+`<md-select>` is a form control for selecting a value from a set of options, similar to the native
+`<select>` element. You can read more about selects in the 
+[Material Design spec](https://material.google.com/components/menus.html).
+
+### Not yet implemented
+
+- Multi-select support
+- Option groups
+- Select headers
+
+## Usage
+
+### Simple select
+
+In your template, create an `md-select` element. For each option you'd like in your select, add an 
+`md-option` tag. The value property of each option dictates the value that will be set in the select's 
+form control when that option is selected. What is between the `md-option` tags is what will be 
+visibly displayed in the list. Note that you can disable items by adding the `disabled` boolean 
+attribute or binding to it.
+
+*my-comp.html*
+```html
+<md-select placeholder="State">
+   <md-option *ngFor="let state of states" [value]="state.code">{{ state.name }}</md-option>
+</md-select>
+```
+
+Output:
+
+<img src="https://material.angularjs.org/material2_assets/select/basic-select-closed.png">
+<img src="https://material.angularjs.org/material2_assets/select/basic-select-open.png">
+
+### Getting and setting the select value
+
+The select component is set up as a custom value accessor, so you can manipulate the select's value using 
+any of the form directives from the core `FormsModule` or `ReactiveFormsModule`: `ngModel`, `formControl`, etc.
+
+*my-comp.html*
+```html
+<md-select placeholder="State" [(ngModel)]="myState">
+   <md-option *ngFor="let state of states" [value]="state.code">{{ state.name }}</md-option>
+</md-select>
+```
+
+*my-comp.ts*
+```ts
+class MyComp {
+  myState = 'AZ';
+  states = [{code: 'AL', name: 'Alabama'}...];
+}
+```
+
+Output:
+
+<img src="https://material.angularjs.org/material2_assets/select/value-select-closed.png">
+<img src="https://material.angularjs.org/material2_assets/select/value-select-open.png">
+
+### Accessibility
+
+The select adds role="listbox" to the main select element and role="option" to each option. It also adds the "aria-owns", "aria-disabled",
+"aria-label", "aria-required", and "aria-invalid" attributes as appropriate to the select.
+
+#### Keyboard events:
+- <kbd>DOWN_ARROW</kbd>: Focus next option
+- <kbd>UP_ARROW</kbd>: Focus previous option
+- <kbd>ENTER</kbd> or <kbd>SPACE</kbd>: Select focused item