Cupcake Copier

Lots of stuff in this release. Most notably:

• gd is now totally stable and the cursor won't jump. EVER
• Copying works correctly and does not elide the final character.
• Improve performance when editing inside quotes or brackets.
• The cursor doesn't jump when editing two files with the same name. #1057

Also a bunch of other bug fixes:

• Fix #1302 - thanks @xlaech
• Fix #1298 - thanks @xconverge
• Fix #1296 - thanks @xlaech
• Fix #1291 - thanks @xlaech
• Fix a bunch of surround.vim issues - thanks @xconverge
• Make gg go to first character rather than (0, 0) - thanks @xconverge (#1320)
• Fix r<tab>