snapshot-82: MacVim Snapshot 82

Binary targets OS X 10.8(Mountain Lion), 10.9(Mavericks), 10.10(Yosemite), and 10.11(El Capitan)

- Vim patch 7.4.922
- Fix spacing issues on Ligatures
- Improve redraw behavior on Ligatures
- Introduce 'macligatures' option for enabling Ligatures

Script interfaces have compatibility with these versions

- Lua 5.2
- Perl 5.16
- Python2 2.7
- Python3 3.5
- Ruby 2.0