Rename `decorate` method to avoid conflicts.

[Fixes #2]

Draper also has a `decorate` method. This rename will solve those
conflicts.

Change-Id: Ice816fe03d1d7f2dd09d92f3e872060df0206ece
Merge pull request #3 from freerunningtechnologies/rename-methods

Rename `decorate` method to avoid conflicts.