added read me with structure

readme.md

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+# angular-pdf [![Build Status](https://travis-ci.org/addyosmani/grunt-uncss.png?branch=master)](https://travis-ci.org/addyosmani/grunt-uncss)
+
+
+>An [AngularJS](http://angularjs.org/) [directive](http://docs.angularjs.org/guide/directive) `ng-pdf` to display PDF files with [PDFJS](http://mozilla.github.io/pdf.js/).
+
+## Preview
+
+Integrate PDF files right into web pages.
+
+![]()
+
+## Getting Started
+
+**Dependencies** [AngularJS](http://angularjs.org/) and [PDFJS](http://mozilla.github.io/pdf.js/).
+
+```
+bower install angular-pdf
+```
+
+## Angular directive
+
+...
+
+### Usage
+
+
+
+## Options
+
+
+
+### Usage examples
+
+##Credit
+
+PDF example used is [Relativity: The Special and General Theory by Albert Einstein](http://www.gutenberg.org/ebooks/30155) as kindly organized and made available free by [Project Gutenberg](http://www.gutenberg.org/wiki/Main_Page).
+
+
+## License
+
+(C) Sayanee Basu 2014, released under an MIT license