0.4.0 - drosophila elegans

  * Introducing Docker Support
  * API optimizations
  * Make error messages more helpful for debugging
  * Improved examples and documentation
  * Introducing hydrate-method to directly convert
    json to liboparl-objects
  * Refining object resolver internals
  * Consolidate parsing of primitive types
  * Introducing a non-strict mode of the client that
    yields warnings instead of errors in case single
    objects cannot be parsed/resolved correctly
  * Improved object validation logic
  * Internationalization
  * Localisations for en_US and de_DE
  * Fixed several bugs

add revision info to meson.build & pkgconfig

Add installation directive to pkgconfig