Fix os.uname on Windows

Author: pettarin

aeneas/globalfunctions.py

@@ -584,7 +584,7 @@ def can_run_cew():
     elif name == "cew":
         return can_run_cew()
     else:
-        if os.uname()[0] == "Linux":
+        if (os.name == "posix") and (os.uname()[0] == "Linux"):
             # Linux
             return can_run_cdtw() and can_run_cmfcc() and can_run_cew()
         else:

check_dependencies.py

@@ -143,7 +143,7 @@ def stepC2():
 
 def stepC3():
     on_info("Test 7/7 (cew)...")
-    if os.uname()[0] != "Linux":
+    if not ((os.name == "posix") and (os.uname()[0] == "Linux")):
         on_info("  Python C Extension cew is not available for your OS")
         on_info("  You can still run aeneas, but it will be a bit slower than Linux")
         return True 

setup.py

@@ -25,7 +25,7 @@
 EXTENSION_CMFCC = Extension("aeneas.cmfcc", ["aeneas/cmfcc.c"], include_dirs=[get_include()])
 
 EXTENSIONS = [EXTENSION_CDTW, EXTENSION_CMFCC]
-if os.uname()[0] == "Linux":
+if (os.name == "posix") and (os.uname()[0] == "Linux"):
     # cew is available only for Linux at the moment
     EXTENSIONS.append(EXTENSION_CEW)