Code review comment for lp://staging/~oif-team/grail/trunk.whatversion

An ABI-breaking change becomes obvious fairly quickly if it affects a developer. If someone is using the undocumented API and their stuff breaks, they can use the readelf tool to determine the symbols are missing and we can point them at the changelogs. Leaving the library version unaltered can save a lot of grief with the downstream Ubuntu people.

This merge builds OK after pulling in the latest unpackaged mtdev, evemu, and frame libraries and runs alright with geistest and the grail-gesture tool on maverick, so I'd give it a pass.