Add functionality and fix some bugs

[mattlongman]

I was looking for something similar to this, so I've cloned it to https://github.com/mattlongman/Hassio-Access-Point with some functionality & additional security outside the scope of just a hostapd setup, but creating this PR with some fixes and features:

Added:

• Set interface in config (defaults to wlan0) (as per https://github.com/davidramosweb/hassio-addons/issues/11)
• Enable hidden SSID in config (as per https://github.com/davidramosweb/hassio-addons/pull/6)
• MAC address filtering (allow or deny)

Fixed:

• networkmanager, net-tools and sudo versions - removed version numbers (as per https://github.com/davidramosweb/hassio-addons/pull/15, https://github.com/davidramosweb/hassio-addons/pull/8, https://github.com/davidramosweb/hassio-addons/issues/14, https://github.com/davidramosweb/hassio-addons/issues/13)
• Corrected broadcast address (as per https://github.com/davidramosweb/hassio-addons/pull/1)

Changed:

• Bumped to v1.0.4
• Enabled wmm ("QoS support, also required for full speed on 802.11n/ac/ax") - have tested on mutiple RPIs, but needs further compatibility testing, and potentially moving option to addon config
• Remove interfaces file. Now generate it with specified interface name