o Did some refactoring: moving utility methods to EclipseUtils so there's no
confusion as to which project is used.
o Use executedProject everywhere except for acquiring the artifact list; the
executedProject misses that list (that's because no deps are resolved in
the forked lifecycle execution; it's delayed until the plugin is encountered
and it's requiresDependencyResolution is seen.)
o Added flag -Declipse.downloadSources=true|false to skip source downloading
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