fix #193

Author: Joe Petviashvili

deps/build.jl

@@ -0,0 +1,10 @@
+global const af_lib = is_unix() ? "libaf" : "af"
+
+try
+    Libdl.dlopen(af_lib)
+catch
+    warn("ArrayFire library not loaded:
+    either download a binary from the official site http://arrayfire.com/download
+    or you can build from source https://github.com/arrayfire/arrayfire")
+    rethrow()
+end