[PATCH] Babel evaluation: location and timing information

[Timothy]

Hi All,

This is a small set of patches to add a bit more information to the messages
emitted in the course of babel evaluation. Specifically about
⁃ What type of element is responsible for the evaluation (source block, babel 
call,
  inline source)
⁃ Where the element is (if no name is set)
⁃ How long evaluation took

For example, previously `C-c C-c' on a babel call would have produced a message
like this:
┌────
│ executing Emacs-Lisp code block...
│ Code block evaluation complete.
└────
and now this might look like so:
┌────
│ executing Emacs-Lisp call on line 143...
│ Code block evaluation complete (took 0.2s).
└────

I think this is a pretty sensible change, but feedback is always nice.

If there are no objections, I expect I’ll merge this in a few days.

All the best,
Timothy

0001-ob-core-Display-line-number-of-exec-babel-blocks.patch
Description: Text Data

0002-ob-core-Display-type-of-element-babel-executes.patch
Description: Text Data

0003-ob-core-Display-babel-execution-time.patch
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