Vim plugin inventory

[shuhei]

To remove (I'm not using and won't use):

• vim-quickrun
• vim-indent-guides
• vim-projectionist

To use more (I'm not using but look cool):

• switch.vim
• gitv
• vim-merginal
• (and other plugins for operations)

Seek alternatives:

• deoplete.nvim
• vimfiler.vim (not maintained anymore. having no problem though)
• unite.vim

[shuhei]

Removed unused ones.