fixed small bug in testing for payload emptiness, since we always require the
binaries to be in the bin/ path we should test if this is empty
code cleanup in node generator and moved created plugin one level down, to allow parallel creation of fragments
payloads are now generated as separate, platform-specific fragments, updated openms sample
renamed node generated package to new package name (com.genericworkflownodes..)
generate feature project when generating node projects
Merge branch 'feature/binaries-as-separate-fragments' into develop
removed openms binaries.zip from sample