move `--profile-dir` alias to base IPython app

allows specifying exact path to profile directory,
rather than just the name.

IPython/core/application.py

@@ -53,6 +53,7 b' from IPython.utils.traitlets import List, Unicode, Type, Bool, Dict, Set, Instan'
 # aliases and flags
 
 base_aliases = {
+    'profile-dir' : 'ProfileDir.location',
     'profile' : 'BaseIPythonApplication.profile',
     'ipython-dir' : 'BaseIPythonApplication.ipython_dir',
     'log-level' : 'Application.log_level',

IPython/parallel/apps/baseapp.py

@@ -71,7 +71,6 b' class ParallelCrashHandler(CrashHandler):'
 base_aliases = {}
 base_aliases.update(base_ip_aliases)
 base_aliases.update({
-    'profile-dir' : 'ProfileDir.location',
     'work-dir' : 'BaseParallelApplication.work_dir',
     'log-to-file' : 'BaseParallelApplication.log_to_file',
     'clean-logs' : 'BaseParallelApplication.clean_logs',