Add installation and uninstallation guide

README.md

@@ -17,3 +17,20 @@ This list contains programs that are directly called by some script/alias/etc..
 - fireplace
 - osu!boot
 - many extraction tools (7z, bzip, etc.), see function.sh#extract().
+
+## Installation
+### User-wide
+```bash
+git clone https://git.staropensource.de/JeremyStarTM/punktdateien-bashrc.git ${HOME}/.bashrc.d
+echo "source \${HOME}/.bashrc.d/startup.sh" >> ${HOME}/.bashrc
+```
+... now restart your shell.
+### System-wide
+```bash
+git clone https://git.staropensource.de/JeremyStarTM/punktdateien-bashrc.git /etc/bashrc.d
+echo -e "export BASHRCD_SYSTEM=true\nsource /etc/bashrc.d/startup.sh" >> /etc/bash.bashrc
+```
+... now restart your shell.
+
+## Uninstallation
+Simply remove `${HOME}/.bashrc.d` or `/etc/bashrc.d` (depending on your installation method) and the `source .../startup.sh` line (+ `export BASHRCD_SYSTEM=true` for system-wide installs).