Release notes
* switch to newer HAL, v0.9.18.0
* ensure compilation against recent kernel versions up to 2.6.20
* ensure compatibility back to kernel 2.4.22, drop support for 2.4.21 and older
* allow compilation without support of features such as fast frames, turbo mode, etc.
* support for some PCI Express cards fixed
* some security-related issues have been patched
* interoperation with wpa_supplicant and hostapd improved
* real channel noise instead of fixed -95dBm noise floor presented
* lots of bugs fixed, for different architectures and various modes of operation
* further improvements for build system