Add support for VMWare Workstation on Windows XP, fixes #237
fixed typo in vmware path on Windows XP, fixes #237/#238
builder/vmware: nitpick some styles

/cc @rasa - I changed up quite a bit here. I tried to reduce function
count if possible, renamed some functions, etc. Overall the
functionality was all spot on, but I felt the functions were too
specialized. Thanks!
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