contextify scariness can be removed

[kylecordes]

I noticed this project has some activity, suggesting it is alive. There is some low hanging fruit to make it a bit more appealing to people like me who wander in: the readme text about contextify can be removed. There is no longer any need or difficulty with that module, if you go to its website they point out that its capabilities are now "in the box" in the node starting all the way back at 0.12.