Implement Paredit commands

[eerohele]

The paredit package doesn't work perfectly with Clojure, and it has no license, so I can't fork it. That means I need to reimplement some subset of Paredit commands from scratch.

See also the Animated Guide to Paredit.

• [x] Open Round
• [x] Close Round
• [ ] Close Round and Newline
• [x] Open Square
• [x] Close Square
• [x] Open Curly
• [x] Close Curly
• [x] Double Quote
• [ ] Meta Double Quote
• [ ] Backslash
• [x] Semicolon
• [x] Comment (dwim)
• [x] Newline (indent.py maybe covers this?)
• [x] Forward Delete
• [x] Backward Delete
• [ ] ~Kill (use Kill Form instead)~
• [x] Backward Kill Form (cf. Backward Kill Word)
• [x] Forward Kill Form (cf. Forward Kill Word)
• [x] Forward
• [x] Backward
• [x] Backward Up
• [x] Forward Down
• [x] Backward Down
• [x] Forward Up
• [x] Wrap Round
• [x] Wrap Square
• [x] Wrap Curly
• [x] Splice Sexp
• [x] Splice Sexp Killing Backward
• [x] Splice Sexp Killing Forward
• [x] Raise Sexp
• [ ] ~Convolute Sexp (probably not, even Cursive doesn't implement it)~
• [x] Forward Slurp Sexp
• [x] Forward Barf Sexp
• [x] Backward Slurp Sexp
• [x] Backward Barf Sexp
• [x] Split Sexp
• [x] Join Sexps
• [x] Recenter on Sexp

[eerohele]

Whew… I think that's all I'm going to implement for now. I'll look at implementing the rest if I come across a situation where I need them (or maybe if someone asks for them).