[ngf-client] Add crude batch execution mode.
[pkg-config] Generate pc file with package version.
[pkg-config] Use NGF API version in pc file.
[packaging] Remove yaml file.
[packaging] Include ngf lib.
[proplist] Save numerical values in pointer and add copy function.
[tests] Add test for ngf_proplist_copy.
[libngf] Remove states not supported by the server.
[ngf-client] Update example state handling.
[build] Bump version to 0.24.0.
Merge pull request #5 from jusa/dev

Update libngf client library.