doc: added version config info to doc

Author: satra

doc/devel/interface_specs.rst

@@ -269,9 +269,9 @@ Common
     performed at runtime.::
 
 	    class RealignInputSpec(BaseInterfaceInputSpec):
-	        jobtype = traits.Enum('estwrite', 'estimate', 'write', min_ver=5,
+	        jobtype = traits.Enum('estwrite', 'estimate', 'write', min_ver='5',
 	                              usedefault=True)
-``deprecated``
+``deprecated`` and ``new_name``
     This is metadata for removing or renaming an input field from a spec.::
 
         class RealignInputSpec(BaseInterfaceInputSpec):
@@ -285,7 +285,6 @@ Common
     from current release. Raises `TraitError` after package version crosses the
     deprecation version.
 
-``new_name``
     For inputs that are being renamed, one can specify the new name of the
     field.::
 
@@ -302,6 +301,11 @@ Common
     When `new_name` is provided it must exist as a trait, otherwise an exception
     will be raised.
 
+.. note::
+
+   The version information for `min_ver`, `max_ver` and `deprecated` has to be
+   provided as a string. For example, `min_ver='0.1'`.
+
 CommandLine
 ^^^^^^^^^^^
 

doc/users/config_file.rst

@@ -109,6 +109,11 @@ Execution
 	data through (without copying) (possible values: ``true`` and
 	``false``; default value: ``false``)
 
+*stop_on_unknown_version*
+    If this is set to True, an underlying interface will raise an error, when no
+    version information is available. Please notify developers or submit a
+    patch.
+
 Example
 ~~~~~~~