Features

Added --use-epoll which uses epoll() rather than select().
Added --use-kqueue which uses kqueue() rather than select().
Add some more additional slot definitions.
Allow the FTDI thread to switch from BAD to GOOD timing granularity.
Change the flags so the negated ones are --no-, this mostly affects --nohttp and --nohttp-quit in olad
Partial Windows support using MinGW. Build instructions are in
README.mingw32.
Working:
- Building simple client applications
- olad, with the web UI
- Plugins: Dummy, ArtNet, ShowNet, ESP Net, SandNet, Pathport, OSC, KiNet
- Python bindings
  Not working yet:
- all other plugins, especially device-based ones (USB, serial, SPI)
- Java bindings
Use the PID (process ID) and current time to init the random seed - #227
Standardise some flags, using --device consistently. This affects ola_artnet, ola_e131 and ola_usbpro
Remove -l long name short option from ola_artnet as it clashes with the global -l log level option. Remove the -e subnet short option too.
Allow the SPI RDM responder's device label to be set and store it in the preferences file.
Added new E1.33 example programs that follow the latest draft document.

Bugs

Changed to a non-recursive build. Reduced build times by 5-25%.
Convert more of our programs to our flags module
Standardise the bool flag behaviour to require an argument like string and int do, add a default bool for the old use case.
Standardise ArtnetConfigMessages to ArtNetConfigMessages and ripple related changes through.