Add ballpointcarrot.net to Examples

Adding my personal blog to the examples page. Includes making excerpts from the posts so that the index page can have a small blurb before going to the post directly.

Author: ballpointcarrot

README.md

@@ -118,6 +118,7 @@ Following sites were created with perun and Boot:
  - [nicerthantriton.com](https://nicerthantriton.com/). See [build.boot](https://github.com/bhagany/nicerthantriton.com/blob/master/build.boot)
  - [200ok.ch](http://200ok.ch). See [build.boot](https://gitlab.com/200ok/200ok.gitlab.io/blob/master/build.boot)
  - [sooheon.com](http://sooheon.com). See [build.boot](https://github.com/sooheon/sooheon.com/blob/master/build.boot)
+ - [ballpointcarrot.net](http://ballpointcarrot.net). See [build.boot](https://github.com/ballpointcarrot/ballpointcarrot.github.io/blob/master/.perun/build.boot)
 
 Also check out [examples](https://github.com/hashobject/perun/tree/master/examples) folder.