Add support for automatic aligning forms

[rrudakov]

Close #16

I copied all related tests from clojure-mode with one exception. should handle incomplete sexps won't work, because syntax tree will be broken.

I also found a few issues in the clojure-ts-align after running full clojure-mode test suite. All the issues are fixed now.

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[rrudakov]

Ready for review.

[bbatsov]

Looks solid to me. Thanks!