add README

README.md

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+# fire
+
+> The ancient DOOM fire animation in the terminal!
+
+### what?
+`fire` is a remake of the PSX DOOM fire animation in the terminal,
+as seen in the [ly](https://github.com/cylgom/ly) display manager.
+It's described nicely by Fabien Sanglard on his
+[blog](https://fabiensanglard.net/doom_fire_psx/index.html).
+
+### where?
+#### supported platforms
+- Linux (musl/glibc) (*tested and supported*)
+- Windows (*should work, but not tested*)
+- (Dragonfly|Net|Free|Open)BSD: (*not tested, might work*)
+
+#### building from source
+You will need:
+- `git`
+- a c99 compiler (gcc or clang)
+- GNU Make (unknown if other `make`s will work)
+
+Clone the source via `git`:
+```
+$ git --recurse clone https://github.com/lptstr/fire
+```
+
+Build:
+```
+$ make
+```
+
+and install:
+```
+# make install
+```
+
+Uninstall, if you wish:
+```
+# rm -f /usr/bin/fire
+```
+
+### how?
+simply run `./fire` (or `fire`, if you installed) and enjoy.
+```
+$ fire
+```
+
+### why?
+I'm bored
+
+### credits
+Thanks to @cylgom, for inspiring me to make this project.
+More thanks to @cylgom, from whose repositories I sto^Hborrowed a lot
+of stuff :)
+
+### license
+This project is licensed under the MIT license. View the LICENSE.md file
+for more information.