Small changes to paredit-mode

[fukamachi]

Changes

• Escape a double quote when inserting it into a string (paredit-insert-doublequote)
• Add a space between the previous element when wrapping an element (paredit-wrap)
• Fix paredit-raise to work when the cursor is at the beginning of a form
• Bind paredit-splice-backward to "M-Up"
• Add paredit-meta-doublequote to wrap a form with double quotes
• Rename paredit-wrap -> paredit-wrap-round, and export it
• Fix paredit-forward and paredit-backward to go up to the parent form at the beginning/end of the form

[cxxxr]

Thanks a lot for the improvements