snapshot-84: MacVim Snapshot 84

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

- Vim patch 7.4.936
- Fix to enable graphical sign
- Update the default Python 2.7 dylib path

Script interfaces have compatibility with these versions

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