doc: add image to readme

close justinmk#195
close justinmk#90

add screenshot

add gif

add gif in readme

optimize gif

Summary of what this gif shows:
1. Listing the whole directory via - command
2. moving files to a folder via `%` (this makes use of `Shdo` and `%`
3. moving back using relative path `../` instead of `%`
4. renaming using a dot `.`

- the gif was optimized by removing the background, and using default vim.
- size is now optimized from 3mb to 142kb

fix gif screenkeys being cut

- make viewport bigger

add demo

- using higher quality gif
- using neovim, so that when you invoke `Shdo` it stays in the editor
- vim's default behavior is jump to terminal and back to editor, which I find a bit jarring.

use demo.gif

Delete dirvish.gif

remove frames that involve shell

- remove the first and last part of the frame where it shows fish shell

update screenshot with demo.gif

remove dirvish.png

doc: add image to readme

close justinmk#195
close justinmk#90

add screenshot

add gif

add gif in readme

optimize gif

Summary of what this gif shows:
1. Listing the whole directory via - command
2. moving files to a folder via `%` (this makes use of `Shdo` and `%`
3. moving back using relative path `../` instead of `%`
4. renaming using a dot `.`

- the gif was optimized by removing the background, and using default vim.
- size is now optimized from 3mb to 142kb

fix gif screenkeys being cut

- make viewport bigger

add demo

- using higher quality gif
- using neovim, so that when you invoke `Shdo` it stays in the editor
- vim's default behavior is jump to terminal and back to editor, which I find a bit jarring.

use demo.gif

Delete dirvish.gif

remove frames that involve shell

- remove the first and last part of the frame where it shows fish shell

update screenshot with demo.gif

remove dirvish.png

README.md

@@ -5,7 +5,7 @@ Path navigator designed to work with Vim's built-in mechanisms and
 [complementary](https://github.com/tpope/vim-eunuch)
 [plugins](https://github.com/tpope/vim-unimpaired).
 
-<img src="./dirvish.png" alt="dirvish" width="400"/>
+<img src="./demo.gif" alt="dirvish" width="452"/>
 
 Features
 --------
@@ -19,6 +19,7 @@ Features
 - _Powerful:_ `:Shdo[!]` generates shell script
 - _Reliable:_ Less code, fewer bugs (96% smaller than netrw). Supports Vim 7.2+
 
+
 Concepts
 --------