Support linux when loading the library

handel/_cffi.py

 """CFFI binding."""
 
+import os
 import cffi
 
 ffi = cffi.FFI()
@@ -48,4 +49,4 @@ int xiaSetLogOutput(char *fileName);
 void xiaGetVersionInfo(int *rel, int *min, int *maj, char *pretty);
 """)
 
-handel = ffi.dlopen("handel.dll")
+handel = ffi.dlopen('handel.dll' if os.name == 'nt' else 'libhandel.so')