* Clean up whitespace in include/ in preparation for .editorconfig. Convert tabs to 4 spaces. Indent by 4 spaces. Strip trailing whitespace. Ensure EOL at EOF.
- implemented dynamic ALSA loading, you shall define PA_ALSA_DYNAMIC when compiling PortAudio library, by default PortAudio will use compile time linkage;
- added PA_ALSA_PATHNAME define to redefine ALSA library path and filename to some other name and location, has effect only together with PA_ALSA_DYNAMIC;
- added extension function (PaAlsa_SetLibraryPathName) which allows to set ALSA library path and filename during application run-time overwriting default set by PA_ALSA_PATHNAME during compilation;
- added API compatibility with Android OS (although ALSA may not be available on your device and usually requires 'root' access rights to open an audio device), some missing ALSA functions are replaced with stubs (needs more input from interested parties), to compile on Android you need to add ALSA headers (get it from Android GIT source-code tree) to compiler's searchable path.
