Removed 'npm install' from prepublish. Due to a strange (but apparently intentional) change in npm, the prepublish hook is now triggered when 'npm install' and 'npm link' are invoked.

https://github.com/isaacs/npm/issues/3059
https://github.com/isaacs/npm/issues/3158
Added quick-and-dirty tool for checking language keys.
Release 1.5.5.