message: docs: Grammar fixes
  Changed several period into colons to be consistent throughout the doc.
  Changed "If don't add the interface..." to "If _you_ don't add the interface..."
  PR Close
diff: @@ -32,7 +32,7 @@ To do this:
  1. Create a `typings.d.ts` file in your `src/` folder. This file is automatically included as global type definition.
  -2. Add the following code in `src/typings.d.ts`.
  +2. Add the following code in `src/typings.d.ts`:
  ```
  declare module 'host' {
  @@ -45,7 +45,7 @@ declare module 'host' {
  }
  ```
  -3. In the component or file that uses the library, add the following code.
  +3. In the component or file that uses the library, add the following code:
  ```
  import * as host from 'host';
  @@ -129,7 +129,7 @@ interface JQuery {
  }
  ```
  -If don't add the interface for the script-defined extension, your IDE shows an error:
  +If you don't add the interface for the script-defined extension, your IDE shows an error:
  ```
  [TS][Error] Property 'myPlugin' does not exist on type 'JQuery'
  