Updates to Effects documentation.

[mackermedia]

• updates patchQuery & addPlanet action var names to match import and usage
• adds file location description as comment (@nhunzaker is there a better path to display?)
• demonstrates adding an Effect to the repo/microcosm

[coveralls]

Coverage increased (+0.3%) to 100.0% when pulling 07bbfb3 on update-effects-docs into ba5c610 on master.

[nhunzaker]

👍 Thanks!