Centered the app, made layout work on mobile, added JSON persistence helper.

.gitignore

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+.*.swp
+workspace
+node_modules

CNAME

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+sfxr.me

README.md

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+Quick 'n' easy game sound effects generator.
+
+App 👉 https://sfxr.me
+
+[About](#about) | [Use as a library](#library) | [Jsfxr Pro](#jsfxr-pro)
+
+# About
+
+A port of [sfxr](http://www.drpetter.se/project_sfxr.html) to HTML5 by Eric Fredricksen.
+Maintained by Chris McCormick.
+
+![jsfxr screenshot](screenshot.png)
+
+# Library
+
+You can use the jsxfr library to generate and play sounds in your JavaScript game code.
+
+## Node
+
+Install it:
+
+```
+npm i jsfxr
+```
+
+Require it:
+
+```
+const sfxr = require("jsfxr").sfxr;
+```
+
+See [API](#API) below for usage examples.
+
+## Browser
+
+Include the scripts in your page:
+
+```
+<script src="https://sfxr.me/riffwave.js"></script>
+<script src="https://sfxr.me/sfxr.js"></script>
+```
+
+You can then directly use the `sfxr` namespace without requiring it.
+
+## API
+
+Generate a sound effect using a preset algorithm and play it using webaudio API.
+
+```javascript
+const sfxr = require("jsfxr").sfxr;
+
+const preset = "pickupCoin";
+const sound = sfxr.generate(preset);
+
+sfxr.play(sound);
+```
+
+Available presets are `pickupCoin`, `laserShoot`, `explosion`, `powerUp`, `hitHurt`, `jump`, `blipSelect`, `synth`, `tone`, `click`, and `random`.
+
+You can also use the interface at https://sfxr.me to find the sound you want and then use the sound definition.
+Click the "serialize" button and copy the JSON code for the sound you want.
+You will get a datastructure that you can use like this:
+
+```javascript
+var sound = {
+  "oldParams": true,
+  "wave_type": 1,
+  "p_env_attack": 0,
+  "p_env_sustain": 0.31718502829007483,
+  "p_env_punch": 0,
+  "p_env_decay": 0.2718540993592685,
+  "p_base_freq": 0.2612<F2>6191208337196,
+  "p_freq_limit": 0,
+  "p_freq_ramp": 0.43787689856926615,
+  "p_freq_dramp": 0,
+  "p_vib_strength": 0,
+  "p_vib_speed": 0,
+  "p_arp_mod": 0,
+  "p_arp_speed": 0,
+  "p_duty": 1,
+  "p_duty_ramp": 0,
+  "p_repeat_speed": 0.7558565452384385,
+  "p_pha_offset": 0,
+  "p_pha_ramp": 0,
+  "p_lpf_freq": 1,
+  "p_lpf_ramp": 0,
+  "p_lpf_resonance": 0,
+  "p_hpf_freq": 0,
+  "p_hpf_ramp": 0,
+  "sound_vol": 0.25,
+  "sample_rate": 44100,
+  "sample_size": 8
+};
+
+var a = sfxr.toAudio(sound);
+a.play();
+```
+
+You can also use the short URL compressed version of the sound:
+
+```javascript
+var a = sfxr.toAudio("5EoyNVSymuxD8s7HP1ixqdaCn5uVGEgwQ3kJBR7bSoApFQzm7E4zZPW2EcXm3jmNdTtTPeDuvwjY8z4exqaXz3NGBHRKBx3igYfBBMRBxDALhBSvzkF6VE2Pv");
+a.play();
+```
+
+You can also access an array of samples.
+By default the buffer contains audio rendered at a sample rate of `44100`.
+
+```
+var buffer = sfxr.toBuffer(sound);
+console.log(buffer);
+```
+
+Additionally you can get a dataURI for a wav file of the sound:
+
+```
+var a = sfxr.toWave(sound);
+console.log(a.dataURI);
+```
+
+You can convert between the base58 short-url encoded format and JSON using `b58encode` and `b58decode`:
+
+```
+var b58string = sfxr.b58encode(sound);
+var sound = sfxr.b58decode(b58string);
+```
+
+You can also access the lower level classes `SoundEffect` and `Params` if you need to.
+This can be useful for caching the internal representation for efficiency, or mutating the sound with `params.mutate()`.
+
+# Jsfxr Pro
+
+A [Pro version of Jsfxr](https://pro.sfxr.me/) is available with enhanced features like the ability to save sounds to packs and download a zip file of all wavs.
+
+[![Jsfxr Pro Screenshot](./jsfxr-pro-screenshot.png)](https://pro.sfxr.me)
+
+# Links
+
+* Application:  http://sfxr.me/
+* Source code:  https://github.com/chr15m/jsfxr/
+
+# Thanks
+
+* Dr. Petter for inventing sfxr.
+* Eric Fredricksen for creating this port.
+* riffwave.js: http://www.codebase.es/riffwave/
+* jquery-ui:   http://jqueryui.com/