dvc move complains about 
**Please provide information about your setup**
DVC version(i.e. `dvc --version`), Platform and method of installation (pip, homebrew, pkg Mac, exe (Windows), DEB(Linux), RPM(Linux))

DVC version: 0.19.2
Method of installation: DEB

When I run `dvc move`, it throws me this error:
```
Error: Unexpected error: 'Stage' object has no attribute 'rel_path'
```
diff --git a/dvc/exceptions.py b/dvc/exceptions.py
index e489a45a2..552326428 100644
--- a/dvc/exceptions.py
+++ b/dvc/exceptions.py
@@ -29,3 +29,12 @@ class OutputDuplicationError(DvcException):
         for stage in stages:
             s += "\\n    " + stage
         super(OutputDuplicationError, self).__init__(msg.format(output, s))
+
+
+class MoveNotDataSourceError(DvcException):
+    def __init__(self, path):
+        msg = "Move is not permitted for stages that are not data sources. " \\
+              "You need to either move '{path}' to a new location and edit " \\
+              "it by hand, or remove '{path}' and create a new one at the " \\
+              "desired location."
+        super(MoveNotDataSourceError, self).__init__(msg.format(path=path))
diff --git a/dvc/project.py b/dvc/project.py
index 10691e1eb..e1fbb2f0c 100644
--- a/dvc/project.py
+++ b/dvc/project.py
@@ -1,6 +1,6 @@
 import os
 
-from dvc.exceptions import DvcException
+from dvc.exceptions import DvcException, MoveNotDataSourceError
 from dvc.stage import Stage
 
 
@@ -209,8 +209,7 @@ class Project(object):
                         continue
 
                     if not stage.is_data_source:
-                        msg = 'Dvcfile \\'{}\\' is not a data source.'
-                        raise DvcException(msg.format(stage.rel_path))
+                        raise MoveNotDataSourceError(stage.relpath)
 
                     found = True
                     to_out = Output.loads_from(out.stage,
diff --git a/tests/test_move.py b/tests/test_move.py
index 9b81b7bb6..d12440068 100644
--- a/tests/test_move.py
+++ b/tests/test_move.py
@@ -1,9 +1,10 @@
 import os
 
 from dvc.main import main
-from dvc.exceptions import DvcException
+from dvc.exceptions import DvcException, MoveNotDataSourceError
 
 from tests.basic_env import TestDvc
+from tests.test_repro import TestRepro
 
 
 class TestMove(TestDvc):
@@ -39,3 +40,15 @@ class TestCmdMove(TestDvc):
 
         ret = main(['move', 'non-existing-file', 'dst'])
         self.assertNotEqual(ret, 0)
+
+
+class TestMoveNotDataSource(TestRepro):
+    def test(self):
+        from dvc.project import Project
+
+        self.dvc = Project(self._root_dir)
+        with self.assertRaises(MoveNotDataSourceError):
+            self.dvc.move(self.file1, 'dst')
+
+        ret = main(['move', self.file1, 'dst'])
+        self.assertNotEqual(ret, 0)
['dvc/project.py', 'tests/test_move.py', 'dvc/exceptions.py']