Version 2.20

- ENH: gpp also handles multi-line pastes. A number (after the corresponding column) is incremented in every line. If there are no increments this way, fall back to replacement of the first occurrence.
- ENH: Add gPp / gPP mappings to paste with all numbers incremented / decremented.
- ENH: Add g]p / g]P mappings to paste linewise with adjusted indent. Thanks to Gary Fixler for the suggestion.