PDT: Move stray files from add-on root folder

The error likely came about because we first commit files to @clockmender's
upstream github repo and then use git format-patch to create patches which
are then applied to the blender add-on repo with:

`git-am -3 --rerere-autoupdate foo.patch`.

Here, the issue seems to be that we've renamed files in the upstream github
repo, but that I then failed to first create and commit empty files with
the same name in the precision_drawing_tools/ repo, which meant that git
did the best it could and added them to the root of the blender add-ons
repo since the files didn't exist in the add-on repo index when they were
added.

1 files changed, 83 insertions, 0 deletions

diff --git a/precision_drawing_tools/pdt_exception.py b/precision_drawing_tools/pdt_exception.py
new file mode 100644
index 00000000..dd2aea4d
--- /dev/null
+++ b/precision_drawing_tools/pdt_exception.py
@@ -0,0 +1,83 @@
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENCE BLOCK *****
+
+# -----------------------------------------------------------------------
+# Author: Alan Odom (Clockmender), Rune Morling (ermo) Copyright (c) 2019
+# -----------------------------------------------------------------------
+#
+# Exceptions are used in the absence of nullable types in python
+
+
+class SelectionError(Exception):
+    """Selection Error Exception."""
+    pass
+
+
+class InvalidVector(Exception):
+    """Invalid Vector Exception."""
+    pass
+
+
+class CommandFailure(Exception):
+    """Command Failure Exception."""
+    pass
+
+
+class ObjectModeError(Exception):
+    """Object Mode Error Exception."""
+    pass
+
+
+class MathsError(Exception):
+    """Mathematical Expression Error Exception."""
+    pass
+
+
+class InfRadius(Exception):
+    """Infinite Radius Error Exception."""
+    pass
+
+
+class NoObjectError(Exception):
+    """No Active Object Exception."""
+    pass
+
+
+class IntersectionError(Exception):
+    """Failure to Find Intersect Exception."""
+    pass
+
+
+class InvalidOperation(Exception):
+    """Invalid Operation Error Exception."""
+    pass
+
+
+class VerticesConnected(Exception):
+    """Vertices Already Connected Exception."""
+    pass
+
+
+class InvalidAngle(Exception):
+    """Angle Given was Outside Parameters Exception."""
+    pass
+
+class ShaderError(Exception):
+    """GL Shader Error Exception."""
+    pass