patch: ob-clojure improvements

[Ag Ibragimov]

Hi everyone, here's my attempt to add clojure CLI and babashka support for 
ob-clojure.el

- Adds a header parameter to override org-babel-clojure-backend
- Adds :args param (right now only used for clojure-cli)

I have tested it with these minimal cases:

#+begin_src clojure :backend clj-cli :args "-Sdeps '{:deps {inflections {:mvn/version 
\"0.13.2\"}}}'"
 (use 'inflections.core)
 (plural "word")
#+end_src

#+begin_src clojure :backend babashka :results output
 (range 10)
#+end_src

Please let me know what you think. Any advice is appreciated, since I have 
never contributed before. Thank you.

ob-clojure-improvements.patch
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