New theme Atomic added and reverted the theme Brainy by default

- Brainy theme reverted to original.
- add Atomic theme based on the original brainy.
- Special thanks to @MunifTanjim and @nwinkler for such excellent job.

themes/brainy/README.md

@@ -2,45 +2,6 @@
 
 Simple colorful terminal prompt theme (inspired by a number of themes).
 
-Supported on all operating systems.
-
-In constant maintenance and improvement
-
-![alt text](https://www.lfsystems.xyz/img/BrainyTheme.gif)
-
-## Install Theme
-
-### Manually
-
-You can install the theme manually by following these steps:
-Edit your modified config `~/.bashrc` file in order to customize Bash-it, set `BASH_IT_THEME` to the theme name `brainy`.
-
-Examples:
-
-```bash
-# Use the "brainy" theme
-export BASH_IT_THEME="brainy"
-```
-
-### Automatically via terminal
-
-1. You can install the theme automatically using the `sed` command from your Linux or OSX Terminal.
-2. On macOS, the ~/.bash_profile is used, not the ~/.bashrc.
-3. For installation on windows you should use [`Git-Bash`](https://git-for-windows.github.io/) or make sure the terminal emulator you use (ej: cygwin, mintty, etc) has the `sed` command installed.
-
-Command to execute For Windows and Linux:
-
-```bash
-# Set the "brainy" theme replacing the theme you are using of bash-it
-sed -i 's/'"$BASH_IT_THEME"'/brainy/g' ~/.bashrc
-```
-Command to execute for macOS:
-
-```bash
-# Set the "brainy" theme replacing the theme you are using of bash-it
-sed -i '' 's/'"$BASH_IT_THEME"'/brainy/g' ~/.bash_profile
-```
-
 ## Features
 
 ### Prompt Segments
@@ -58,7 +19,7 @@ sed -i '' 's/'"$BASH_IT_THEME"'/brainy/g' ~/.bash_profile
 ### Others
 
 - Indicator for cached `sudo` credential
-- Indicator for abort (ctrl + C) the current task and regain user control
+- Indicator for ssh login
 - `brainy` command for showing/hiding various prompt segments on-the-fly
 
 ## Configuration