Parallel installer for Neovim
Stabilize Neovim installer

- Abort running jobs when plug windows is reset
- Multi-line error report
- Retain window view
Avoid unnecessary tab/window switch
Disable NVim parallel installer on Windows
Use s:lines instead of split
Reuse plug window even if it's in another tab
Detect abnormal process exit using 'Error' line
Code cleanup
Update test case (related: #8c915a5)
Minor refactoring
Use s:extract_name instead of matchstr
Improve ]]/[[ movement
Sort auto-completion candidates
Merge pull request #103 from junegunn/neuevim

Parallel installer for Neovim