Fix for elec-pair mode

Because electric-pair-backward-delete-char-untabify was deleted.
Merge pull request #235 from defunkt/fix-for-electric-pair

Fix for elec-pair mode
Compile command is executed asynchronously now
Merge pull request #236 from defunkt/asynchronous

Compile command is executed asynchronously now
remove electric-pair-delete-pair
Merge pull request #237 from waymondo/master

remove electric-pair-delete-pair
Remove electric-pair specific test

We need not to consider whether electric-pair-mode is enabled
by following change. This is related to #237.

https://lists.gnu.org/archive/html/emacs-diffs/2014-04/msg00059.html