Add brace_style "none" option + tests for javascript, then cleanup all brace_style tests

[c32hedge]

Javascript side of fix for issue #538. The last 3 commits here are more of a cleanup + refactor,
so that there's a single block of tests for brace style instead of 4 big blocks to try and keep consistent.
I might be able to make the original change to the code and tests in python but don't trust my
rudimentary python skills to be the one to do the same refactor there if it's desired/needed.

[c32hedge]

Note that the refactor significantly increases the number of tests run even though they're all in one place now--several different permutations of whitespace are tested on the input for each one.

[bitwiseman]

First, thanks! Great contribution. Solid idea to make the brace tests more consistent.

First glance review:

• Change the + eo + structure into where you use @eo or some other easily recognized string and implement a modified bt() that replaces those strings with the appropriate values. For example btbr("a = function(){return a;};", "a = function()@eo{return a;@ec};", eo, ec). I don't mean this specifically, but you get the idea.
• Implement python port (I know what you're saying about not knowing python, but we've done a lot of work to make the code line up and minimize the cost of maintaining parity.)
• Implement the tests in python (You can do this. Seriously, it's just python. Take a swing at it.)

I might have some additional suggestions, but I'm really impressed with the minimalistic change to the product code, so probably not much else to do here.

[bitwiseman]

Actually, if you haven't started the modification to the test code, skip that. #216 will address that and you've inspired me to make that the next thing I do. Just get the python implementation and the tests for it you can copy and paste from c32hedge@140b18e .

[c32hedge]

Alright. I did have some WIP at c32hedge/js-beautify@b7bde28 (wasn't quite there but addressed some gotchas you might run into)

[bitwiseman]

Cool thanks.

[c32hedge]

(note that those 'gotchas' were specific to your original suggestion on changing the + eo + structure of the brace position tests, not necessarily #216 in general)

[c32hedge]

Done--implemented python side, and copied over tests from c32hedge/js-beautify@140b18e as requested.

[bitwiseman]

Excellent! Thanks!