diff --git a/TODO.md b/TODO.md
new file mode 100644
index 0000000..0b27b8f
--- /dev/null
+++ b/TODO.md
@@ -0,0 +1,4 @@
+* proper reloading
+* import sensor size?
+* license
+* show warning if no 3D view is open
\ No newline at end of file
diff --git a/fspy_blender/__init__.py b/fspy_blender/__init__.py
index 6ba0ee6..8a1e1b7 100644
--- a/fspy_blender/__init__.py
+++ b/fspy_blender/__init__.py
@@ -1,20 +1,18 @@
-'''
-fSpy Blender importer
-Copyright (C) 2018 - Per Gantelius
-
-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 3 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, see <http://www.gnu.org/licenses/>.
-'''
+# fSpy Blender importer
+# Copyright (C) 2018 - Per Gantelius
+#
+# 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 3 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, see <http://www.gnu.org/licenses/>.
 
 # Add-on metadata
 bl_info = {
diff --git a/fspy_blender/addon.py b/fspy_blender/addon.py
index 392d0dc..bad7197 100644
--- a/fspy_blender/addon.py
+++ b/fspy_blender/addon.py
@@ -1,20 +1,18 @@
-'''
-fSpy Blender importer
-Copyright (C) 2018 - Per Gantelius
-
-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 3 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, see <http://www.gnu.org/licenses/>.
-'''
+# fSpy Blender importer
+# Copyright (C) 2018 - Per Gantelius
+#
+# 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 3 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, see <http://www.gnu.org/licenses/>.
 
 import bpy
 import mathutils
diff --git a/fspy_blender/fspy.py b/fspy_blender/fspy.py
index 218ef99..1ab2bca 100644
--- a/fspy_blender/fspy.py
+++ b/fspy_blender/fspy.py
@@ -1,20 +1,18 @@
-'''
-fSpy Blender importer
-Copyright (C) 2018 - Per Gantelius
-
-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 3 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, see <http://www.gnu.org/licenses/>.
-'''
+# fSpy Blender importer
+# Copyright (C) 2018 - Per Gantelius
+#
+# 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 3 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, see <http://www.gnu.org/licenses/>.
 
 import os
 import json