Updates the cmake build system

It's still has some work, but it successfully builds on
all 3 main platforms.  Some of the outstanding items
include:

   Install target testing (mostly important for Linux)
   CMakeList clean up and comments
   Debug and Release build verification
   Audit of compile/link options
   Need a Mac signed and notarized build
   (and probably more)

cmake-proxies/soundtouch/soundtouch_config.h.in

@@ -0,0 +1,75 @@
+/* include/soundtouch_config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Define to 1 if you have the <cpuid.h> header file. */
+#cmakedefine HAVE_CPUID_H 1
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#cmakedefine HAVE_DLFCN_H 1
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#cmakedefine HAVE_INTTYPES_H 1
+
+/* Define to 1 if you have the `m' library (-lm). */
+#cmakedefine HAVE_LIBM 1
+
+/* Define to 1 if your system has a GNU libc compatible `malloc' function, and
+   to 0 otherwise. */
+#cmakedefine HAVE_MALLOC 1
+
+/* Define to 1 if you have the <memory.h> header file. */
+#cmakedefine HAVE_MEMORY_H 1
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#cmakedefine HAVE_STDINT_H 1
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#cmakedefine HAVE_STDLIB_H 1
+
+/* Define to 1 if you have the <strings.h> header file. */
+#cmakedefine HAVE_STRINGS_H 1
+
+/* Define to 1 if you have the <string.h> header file. */
+#cmakedefine HAVE_STRING_H 1
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#cmakedefine HAVE_SYS_STAT_H 1
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#cmakedefine HAVE_SYS_TYPES_H 1
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#cmakedefine HAVE_UNISTD_H 1
+
+/* Define to the sub-directory in which libtool stores uninstalled libraries.
+   */
+#cmakedefine LT_OBJDIR "@LT_OBJDIR@"
+
+/* Define as the return type of signal handlers (`int' or `void'). */
+#cmakedefine RETSIGTYPE @RETSIGTYPE@
+
+/* Do not use x86 optimizations */
+#cmakedefine SOUNDTOUCH_DISABLE_X86_OPTIMIZATIONS 1
+
+/* Use Float as Sample type */
+#cmakedefine SOUNDTOUCH_FLOAT_SAMPLES 1
+
+/* Use Integer as Sample type */
+#cmakedefine SOUNDTOUCH_INTEGER_SAMPLES 1
+
+/* Define to 1 if you have the ANSI C header files. */
+#cmakedefine STDC_HEADERS 1
+
+/* Version number of package */
+#cmakedefine VERSION "@VERSION@"
+
+/* Define to empty if `const' does not conform to ANSI C. */
+#cmakedefine const @const@
+
+/* Define to `__inline__' or `__inline' if that's what the C compiler
+   calls it, or to nothing if 'inline' is not supported under any name.  */
+#ifndef __cplusplus
+#cmakedefine inline @inline@
+#endif
+
+/* Define to rpl_malloc if the replacement function should be used. */
+#cmakedefine malloc @malloc@