Fixes SetStaticFieldStage to do what it's supposed to do.

No longer turns all values it touches into lists, and instead behaves as expected. Resolves #212, #213
Merge pull request #214 from jwestberg/set-static-field

Fixes SetStaticFieldStage to do what it's supposed to do.
Adds enum support to Parameter injection
Merge pull request #215 from jwestberg/enum-parameter-support

Adds enum support to Parameter injection
Merge branch 'master' into 0.3.x