Fix twitter feed

[butler]

Currently twitter is mostly posting commits which is probably counterproductive. For those that want to follow that level of detail slack is probably the thing to use (or subscribe to github notifications?). Here basically makes people unfollow so they don't get a ton of junk. Would be more useful to post regular updates of code camps, releases, betas, pre releases, activities going on (e.g. working on using Jeffrey orbitals for orientational distribution. HARD!) etc.