Set version to 0.5.0 (#133)

Doxyfile

@@ -38,7 +38,7 @@ PROJECT_NAME           = "JWT-C++"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.5.0-rc.0
+PROJECT_NUMBER         = 0.5.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a

README.md

@@ -7,6 +7,7 @@
 [![Windows Badge][Windows]][Cross-Platform]
 [![Coverage Status](https://coveralls.io/repos/github/Thalhammer/jwt-cpp/badge.svg?branch=master)](https://coveralls.io/github/Thalhammer/jwt-cpp?branch=master)
 [![Documentation Badge](https://img.shields.io/badge/Documentation-master-blue)](https://thalhammer.github.io/jwt-cpp/)
+[![GitHub release (latest SemVer including pre-releases)](https://img.shields.io/github/v/release/Thalhammer/jwt-cpp?include_prereleases)](https://github.com/Thalhammer/jwt-cpp/releases)
 [![Stars Badge](https://img.shields.io/github/stars/Thalhammer/jwt-cpp)](https://github.com/Thalhammer/jwt-cpp/stargazers)
 
 [Linux]: https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/Thalhammer/jwt-cpp/badges/cross-platform/ubuntu-latest/shields.json