fix createfile/createfolder when using ~

vispa/remote/filesystem.py

@@ -164,7 +164,7 @@ class FileSystem(object):
 
     def create_folder(self, path, name):
         # folder with the same name existent?
-        fullpath = os.path.join(path, name)
+        fullpath = os.path.expanduser(os.path.expandvars(os.path.join(path, name)))
         if os.path.isdir(fullpath):
             raise Exception("Name already in use!")
         try:
@@ -175,7 +175,7 @@ class FileSystem(object):
 
     def create_file(self, path, name):
         # file with the same name existent?
-        fullpath = os.path.join(path, name)
+        fullpath = os.path.expanduser(os.path.expandvars(os.path.join(path, name)))
         if os.path.exists(fullpath):
             raise Exception("Name already in use!")
         try: