docs(install): add info about install

Author: blond

README.md

@@ -19,6 +19,13 @@ About
 
 This tool allows getting information about BEM entity using [string](#string-representation) as well as forming string representation based on [BEM-naming](#bem-naming).
 
+Install
+-------
+
+```
+$ npm install --save bem-naming
+```
+
 Usage
 -----
 

README.ru.md

@@ -19,6 +19,13 @@ bem-naming
 
 Инструмент позволяет получать информацию о БЭМ-сущности по [строке](#%D0%A1%D1%82%D1%80%D0%BE%D0%BA%D0%BE%D0%B2%D0%BE%D0%B5-%D0%BF%D1%80%D0%B5%D0%B4%D1%81%D1%82%D0%B0%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D0%B5), а так же формировать строковое представление на основе [БЭМ-нотации](#%D0%91%D0%AD%D0%9C-%D0%BD%D0%BE%D1%82%D0%B0%D1%86%D0%B8%D1%8F).
 
+Установка
+---------
+
+```
+$ npm install --save bem-naming
+```
+
 Быстрый старт
 -------------