Integrating the parameter editor into the node UI would not be a pleasant sight. Also, it wouldn't be all that functional. Sure, Blender does that, but it is just overcomplication in my opinion (I'm learning Blender right now and Olive's node system is much easier to deal with). It's simpler to just have all of the nodes pass all of their data to the next ones in line and manipulate the finer details with the parameter editor.
The node graph is supposed to represent the flow of data, with the parameter editor coupled with the typing of nodes (no, I'm not using “typing” incorrectly here) being used for the manipulation of data within that flow. I'm not somebody who knows this extensively, so some of the details above might not be quite correct, but I do know enough to know that an interface and separate sockets on the nodes is not the way to go.
https://www.olivevideoeditor.org/nightly.php
Nightly builds for version 0.2 are being released regularly which is why I am asking about this specific feature and when/if it will be included in the 0.2 builds.
The download on the website is up to date, I should have checked, the download link on the website is right to it, but heres the link regardless
Sadly the only way is to compile it yourself. Depending on your OS extract the archive (zip for windows and tar.gz for linux) and than compile it. This is significantly easier for linux. Here is how to do it: https://www.olivevideoeditor.org/compile.php
I had the same problem on Linux debian, even my audio was not working, and that because you may need to install a multimedia module which are not installed by default.
I find some useful command on this page: https://www.olivevideoeditor.org/compile.php
Just to be clear, i installed at first the essential build environment and then i installed the Qt5 modules ...
Hope it can help you