Update Readme

README.md

@@ -15,10 +15,25 @@ Please refer to the image below. PHPExcel has been unable to work properly for m
 
 ![php-excel](https://github.com/viest/php-excel-writer/blob/master/resource/performance_comparison.png)
 
-[中文文档](https://github.com/viest/php-ext-excel-export/blob/master/README_zh.md) | [Documents](https://github.com/viest/php-ext-excel-export/wiki)
+xlswriter is a PHP C Extension that can be used to write text, numbers, formulas and hyperlinks to multiple worksheets in an Excel 2007+ XLSX file. It supports features such as:
+
+* 100% compatible Excel XLSX files.
+* Full Excel formatting.
+* Merged cells.
+* Defined names.
+* Autofilters.
+* Charts.
+* Data validation and drop down lists.
+* Worksheet PNG/JPEG images.
+* Memory optimization mode for writing large files.
+* Works on Linux, FreeBSD, OpenBSD, OS X, Windows.
+* Compiles for 32 and 64 bit.
+* FreeBSD License.
+
+[文档](https://github.com/viest/php-ext-excel-export/blob/master/README_zh.md) | [Documents](https://github.com/viest/php-ext-excel-export/wiki)
 
 [![pecl](https://github.com/viest/php-excel-writer/blob/master/resource/pecl.png)](https://pecl.php.net/package/xlswriter)
 
 #### License
 
-BSD license
+FreeBSD license