snapshot-83: MacVim Snapshot 83

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

- Vim patch 7.4.930
- Fix character width for powerline font characters
- Fix inputdialog issue

Script interfaces have compatibility with these versions

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