Quotes around test in example SBT settings

Literally using the example build configuration gave me:

```
/Users/richard/Developer/typelevel-kitchensink/build.sbt:48: error: overloaded method value % with alternatives:
  (configurations: String)sbt.ModuleID <and>
  (configuration: sbt.Configuration)sbt.ModuleID
 cannot be applied to (sbt.TaskKey[Unit])
  "com.github.julien-truffaut"  %%  "monocle-law"     % monocleVersion % test
                                                                       ^
```

The fix for me was to replace `test` with `"test"`.
Merge pull request #88 from d6y/patch-1

Quotes needed around test in example SBT settings
#69 Add OneAnd instances for Head, Tail, Index and LastOption
Upgrade scalaz to 7.1.0-RC1
Update doc
#80 Add SomeIso and Some instance for Each, HeadOption, LastOption
Rename a few instances
#85 Deprecate _1 to _6 for first to sixth
#69 Add OneAnd instance for Each
Reorganize function instances
Update sbt resolver
Improved type inference for Simple optic construction

(see #91)
Flipped 'n' curried versions of set & modify
Merge pull request #97 from japgolly/flipcur

Flipped 'n' curried versions of set & modify
Tweak syntax for {set,modify}F

Without this tweak, Scalac complains during function composition.
Example: a.setF(3) compose b.setF("hi")

Follow up to #97
Added modification chaining example
Made {set,modify}F return types explicit
PR feedback: added doco to explain alternative simple optic creation syntax
Merge pull request #99 from japgolly/flipcur

Tweak signature of {set,modify}F
Merge pull request #100 from japgolly/typeinfer

Improved type inference for Simple optic construction [PR]