Fix `org-export-babel-evaluate' handling
* lisp/ob-exp.el (org-babel-exp-process-buffer): Handle
`org-export-babel-evaluate' handling.
(org-babel-exp-results): Ignore `org-export-babel-evaluate' since it is
handled as a higher level.
* lisp/ox.el (org-export-as): Allow to short-circuit babel evaluation if
`org-export-babel-evaluate' is nil.
* testing/lisp/test-ob-exp.el (ob-export/babel-evaluate): New test.
Reported-by: Nicolas Richard <nrichard@ulb.ac.be>
<http://permalink.gmane.org/gmane.emacs.orgmode/106767>