Update README.md

README.md

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-<img src="https://github.com/MrNavaStar/GDMP/blob/master/gdmp.png?raw=true" height="300">
+# GDMP
+
+<img src="https://github.com/MrNavaStar/GDMP/blob/master/gdmp.png?raw=true" width="100%">
+
+GDMP (Get Down Mr President) is an easy to use signal/io filtering application for unix! It can be run in conjuction with any other command.
+
+# Usage
+
+You can catch most unix signals sent to an application, excluding only special signals such as SIGKILL. You can find a full list of signals [here](https://www-uxsup.csx.cam.ac.uk/courses/moved.Building/signals.pdf).
+
+A signal can be listened for by passing the name of the signal (excluding the sigpart):
+```bash
+# listen for SIGINT or ctr+c
+gdmp -int my_prog --my-prog-flags/args
+```
+You can block a signal from reaching the program by passing -x after the signal name.
+```bash
+# Block SIGINT or ctrl+c
+gdmp -int -x my_prog --my-prog-flags/args
+```
+You can write to a programs stdin when a signal is captured. This works regaurdless if the signal is blocked or not.
+```bash
+# Write "hello program!" to stdin on SIGINT or ctrl+c
+gdmp -int -x -w "hello program!" my_prog --my-prog-flags/args
+```
+You also run a bash command when a signal is captured.
+```bash
+gdmp -int -w -s "echo 'hello!'" my_prog --my-prog-flags/args
+```
+
+Signal chaining can be used to apply modifiers to signals in bulk:
+```bash
+# Block SIGINT, SIGTERM, SIGHUP and write "wow!" to stdin on SIGUSR1 or SIGUSR2.
+gdmp -int -term -hup -x -usr1 -usr2 -w "wow!" my_prog --my-prog-flags/args
+```
+
+# Compiling and installing
+You can download a prebuilt binary from the [releases page](https://github.com/MrNavaStar/GDMP/releases).
+
+To compile the program for yourself you can run:
+```bash
+git clone https://github.com/MrNavaStar/GDMP.git
+sudo make install
+```
+The program is a signal binary and will be installed to /usr/local/bin. The make file also provides `make uninstall` to remove the program for you.