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/lv2/lilv_config.h.in

@@ -0,0 +1,24 @@
+/* WARNING! All changes made to this file will be lost! */
+
+#ifndef W_LILV_CONFIG_H_WAF
+#define W_LILV_CONFIG_H_WAF
+
+#cmakedefine LILV_CXX 1
+#define PYTHONDIR "@PYTHONDIR@"
+#define PYTHONARCHDIR "@PYTHONARCHDIR@"
+#define LILV_VERSION "@LILV_VERSION@"
+#cmakedefine HAVE_LV2 1
+#cmakedefine HAVE_SERD 1
+#cmakedefine HAVE_SORD 1
+#cmakedefine HAVE_SRATOM 1
+#cmakedefine HAVE_SNDFILE 1
+#cmakedefine HAVE_LSTAT 1
+#cmakedefine HAVE_FLOCK 1
+#cmakedefine HAVE_FILENO 1
+#cmakedefine HAVE_CLOCK_GETTIME 1
+#cmakedefine HAVE_LIBDL 1
+#define LILV_PATH_SEP "@LILV_PATH_SEP@"
+#define LILV_DIR_SEP "@LILV_DIR_SEP@"
+#define LILV_DEFAULT_LV2_PATH "@LILV_DEFAULT_LV2_PATH@"
+
+#endif /* W_LILV_CONFIG_H_WAF */