README.md
# QRCode
generate qrcode util
## Installation
by adding `qrcode` to your list of dependencies in `mix.exs`:
```elixir
def deps do
[
{:qrcode, "~> 0.1.0"}
]
end
```
## Usage
```elixir
QRCode.to_png_file("hello world", "/Users/hello/tmp/helloworld.png")
```