Changed API key name
Changed API key name

The API key name used in the blend4j sources is currently "test.galaxy.key" instead of "test.api.key". Maybe it's clearer to include api in the key name, but I propose to change the readme until we've decided.
greenwoodma/blend4j,apetkau/blend4j,jmchilton/blend4j,apetkau/blend4j,jmchilton/blend4j,greenwoodma/blend4j