Bugfixes and new build system

• Various bugfixes
• Change build system to cmake
• Clean up directory structure
• Add Travis CI script
• Make some internal helpers available to apps
• Clean up noexcept and const correctnes

Debian packaging improvements

v0.3.1

Change to quilt package, makefile updates

Bugfixes and minor improvements

Change variable names

closes #30

Bugfixes and PSS support

v0.2.0

Update README.md

Initial release

v0.1.0

Create LICENSE