Fixing minor regressions from general store commit

A few Completer methods that should have been forwarded to general completers
were not. This broke the identifier completer picking up the current identifier
right after it's typed in.

python/completers/completer.py

@@ -279,6 +279,7 @@ class Completer( object ):
   def ShowDetailedDiagnostic( self ):
     pass
 
+
   def GettingCompletions( self ):
     return False
 

python/completers/general/general_completer_store.py

@@ -129,3 +129,12 @@ class GeneralCompleterStore( Completer ):
     for completer in self._all_completers:
       completer.OnInsertLeave()
 
+
+  def OnCurrentIdentifierFinished( self ):
+    for completer in self._all_completers:
+      completer.OnCurrentIdentifierFinished()
+
+
+  def GettingCompletions( self ):
+    for completer in self._all_completers:
+      completer.GettingCompletions()