Update README.md, add screenshot

Author: Roturgo

README.md

@@ -1,2 +1,21 @@
 # bashrc
-Some Bash improvements to add into your .bashrc config
+Some Bash improvements to add into your `.bashrc` config file
+
+# Instructions
+Append the configurations in `bashrc.txt` to your `.bashrc` configuration file in your home directory.
+
+# Improvements
+These are the quality of life enhancements contained in this `.bashrc` template
+
+## History
+* Increase the history file size
+* Format `history` command output to include a timestamp of when the command was run
+* Make it less likely that multiple Bash sessions for the same user will clobber each other's history
+
+## Up-arrow History Completion
+* Typing part of a command and pressing up/down will scroll through previous runs of the command from your Bash history
+
+## Shell colors and prompt formatting
+* Make your default Bash prompt a bit easier to parse, colorize it, and colorize specific output in your shell
+
+![A preview of the Bash shell when these .bashrc settings are applied](bash-screenshot.png "Bash Screenshot")