ImaginationAPI is an API to allow compatability with multible minecraft versions in a single mod.
It Should also be helpful for beginning modders because it provides a simple base API.
The details are still being worked out, but you'll get the API soon!
So far this mod is a W.I.P.
For things that ONLY work in a specific version, make shure to use @VersionOnly or the main mod file's getGameVersion() for "if (MultiVersionAPIMain.getGameVersion == "1.7")"