Release version 1.3.0

The most important change made in this release is requiring pocketsphinx version 0.1.15. This is done as a temporary measure, so that the library continues to work as intended. It will (hopefully) be updated to use pocketsphinx v5 at some point in the future, though that will involve a number of breaking changes.

There have been a few minor changes to the library. Please see the commit history for those. I have also taken the time to rewrite all example in the repository's examples folder.