[Issue #90] Add option `sp-undo-pairs-separately`.
Add keymap description to `smartparens-mode`.
[Issue #101] Fix `sp-get-string` returning nil before string without any symbol inside it.
Fix escapes in stringlike expressions. Fix strings not being recognized from within if the major mode defines the string syntax.
[Issue #81] Add `sp-kill-word` to remove word and keep intervening delimiters balanced.
[Issue #81] Fix word kill if the point is inside symbol. Now kills the following word, not from the beginning of symbol.
Make the wrapping function generated by :bind independent of `sp-autowrap-region`