Update CHANGELOG.md

CHANGELOG.md

@@ -61,6 +61,12 @@ Neofetch now has an irc channel at `#neofetch` on Freenode. If you have any ques
 - Added Haiku cores command.
 - Updated Linux and macOS commands to the match the commands in the `get_cpu()` function.
 
+**~~Birthday~~Install Date**<br \>
+
+- Renamed `get_birthday()` -- > `get_install_date()`
+- Removed all `date` usage from `get_install_date()`. 
+- Added a new function called `convert_time()` which takes the time stamped `ls` output and converts it to a pretty format. The function only uses bash so its much faster than calling `date`. This makes things simple and keeps the output consistent across all Operating Systems. Example: `2016-12-06 16:58:58.000000000` --> `Tue 06 Dec 2016 4:58 PM`
+
 **Disk**<br \>
 
 - Warn the user if `df` isn't installed.