Merge pull request #409 from ndusart/lopdf

Add lopdf to the list

README.md

@@ -743,6 +743,7 @@ See also [Are we game yet?](http://arewegameyet.com)
 * PDF
   * [kaj/rust-pdf](https://github.com/kaj/rust-pdf) — [<img src="https://api.travis-ci.org/kaj/rust-pdf.svg?branch=master">](https://travis-ci.org/kaj/rust-pdf)
   * [fschutt/printpdf](https://github.com/fschutt/printpdf) — PDF writing library [<img src="https://api.travis-ci.org/fschutt/printpdf.svg?branch=master">](https://travis-ci.org/fschutt/printpdf)
+  * [J-F-Liu/lopdf](https://github.com/J-F-Liu/lopdf) — PDF document manipulation [<img src="https://api.travis-ci.org/J-F-Liu/lopdf.svg?branch=master">](https://travis-ci.org/J-F-Liu/lopdf)
 * [Vulkan](https://www.khronos.org/vulkan/) [[vulkan](https://crates.io/keywords/vulkan)]
   * [vulkano](https://github.com/vulkano-rs/vulkano) [[vulkano](https://crates.io/crates/vulkano)] — [<img src="https://api.travis-ci.org/vulkano-rs/vulkano.svg?branch=master">](https://travis-ci.org/vulkano-rs/vulkano)