more profile awareness from config.manager to IPython subclass

also enables specifying profile by name,
instead of full path.

IPython/config/manager.py

@@ -8,7 +8,6 b' import json'
 import os
 
 from IPython.config import LoggingConfigurable
-from IPython.utils.path import locate_profile
 from IPython.utils.py3compat import PY3
 from IPython.utils.traitlets import Unicode
 
@@ -35,22 +34,12 b' def recursive_update(target, new):'
 
 
 class BaseJSONConfigManager(LoggingConfigurable):
-    """General config manager 
+    """General JSON config manager
     
     Deals with persisting/storing config in a json file
-    in IPython profile
     """
 
-    profile_dir = Unicode()
-    def _profile_dir_default(self):
-        return locate_profile()
-
-    @property
-    def config_dir(self):
-        return self._config_dir()
-
-    def _config_dir(self):
-        return self.profile_dir
+    config_dir = Unicode('.')
 
     def ensure_config_dir_exists(self):
         try:

IPython/html/services/config/manager.py

@@ -3,12 +3,19 b''
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
 
-import os
-
 from IPython.config.manager import BaseJSONConfigManager
+from IPython.utils.path import locate_profile
+from IPython.utils.traitlets import Unicode
 
 class ConfigManager(BaseJSONConfigManager):
     """Config Manager used for storing notebook frontend config"""
+    
+    profile = Unicode('default', config=True)
+    
+    profile_dir = Unicode(config=True)
+    
+    def _profile_dir_default(self):
+        return locate_profile(self.profile)
 
-    def _config_dir(self):
-        return os.path.join(self.profile_dir, 'nbconfig')
+    def _config_dir_default(self):
+        return self.profile_dir