Suspend OSX support for civetweb for an indefinite period

Currently TravisCI only offers experimental support for OSX,
the check unit test framework does not work for OSX now,
and I can not do the tests locally.
See #94

.travis.yml

@@ -8,7 +8,7 @@ compiler:
 
 os:
   - linux
-  - osx
+#  - osx
 
 env:
   global: