Allow audioData.cs.dso to execute

When using only compiled scripts, the isFile( "./audioData.cs" ) would
fail for audioData.cs.dso causing none of the audio data to load.  The
correct method is to use isScriptFile(), along with a fully qualified
file path, to check for either the .dso or .cs files.
Merge pull request #477 from DavidWyand-GG/AudioData

Allow audioData.cs.dso to execute