Issue #73 and Source encoding problem

It seems the problem was a ISO1252 configuration in  src/test/resources/ files.There the conf set 
`groovy.source.encoding` to `ISO1252` in `compilerConfiguration.groovy` and `compilerConfiguration.properties`.
Source files are in UTF-8, so I put  `groovy.source.encoding` to `UTF-8` (and changed  `src/test/groovy_scripts/platform/impl/testGroovyVerticleFactory.groovy` to comply) and everything worked (besides a silly
broken test I had added).
I'm not sure of why it worked before, and why it didn't work anymore. Groovy 2.3.3 seems stricter than old goovy versions, when I migrated mod-lang-groovy to Groovy 2.3.3 last week, I had to make some 
changes to comply. So maybe it is. If you have another explanation, I'd love to hear it :)

Going to push the pull request now...