I know there is a basic orbit editor in the 1.2 prereleases, but it's absolutely horrible.
I did some testing, and in the Kerbaltek folder (which is the folder that goes in GameData for installing Hyperedit), there are a few things,
5 flags, super easy to add to stock,
A .dll, also super easy to add to stock,
2 .cfg files which are generated while the player is playing KSP, they go into a folder in the Kerbaltek folder called HyperEdit, although it could be reconfigured to put them in another folder,
And a file in the HyperEdit folder which looks like it's just a version info file, unnecessary to add to stock,
I copied the contents of the Kerbaltek folder and put them in the Squad folder, then deleted the Kerbaltek folder, after loading the game, HyperEdit works fine, with all it's features.
Basically, HyperEdit would be really easy to put in stock, the same thing would probably work for KER and KAC, both mods that need to be added.
If implemented, this would be THE easiest to add major feature in KSP history, no new code, no new textures and no new models, just copy-pasting.