It would be better to install/upgrade Vim plugins as fast as possible.
Since `vim-flavor` manages Vim plugins with Git, it has to clone each plugin's
repository at first, and it also has to fetch changes from time to time.
But network access is typically time-consuming.

Therefore `vim-flavor` caches fetched stuffs.  The cache is stored in
`~/.vim-flavor`.  When `vim-flavor` needs to deploy plugins, it avoids network
access as much as possible.




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Add the cover for "Caching"
Add the cover for "Caching"
