Add Flymaster Firmware Installer (1.2)
user
```ruby
class FmFwInstaller < Cask
  url 'http://www.flymaster-avionics.com/LinkClick.aspx?fileticket=Udjm4iuMhL8%3d&tabid=199&mid=804&forcedownload=true'
  homepage 'http://www.flymaster-avionics.com/Support/Downloads/ForMacOSX/tabid/199/Default.aspx'
  version '1.2'
  sha1 '7596542e4a1ba2238d8582b60494a6a0225996f7'
  link 'Firmware Installer.app'
end
```
assistant