Streamlining Ober

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I made some changes to Ober that make it quicker to use. Now, when you right-click a word, Ober does everything in path-like fashion:
  1. if the word is an Ober built-in, execute it
  2. if the word is a class name, run the main with the args to end of line
  3. if the word is a shell command, run it
  4. if the word is a file, directory, or URL, open it
If you middle click, that sets a hint to tell the command that if it is appropriate, open a new viewer instead of replacing the current one.

Also, I made a runnable jar for it all, so you don't have to build it.

Here's the new doc page

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