Support for Blender 2.80+ (#20)

* Updates to script based on Blender 2.80 API changes

Changed the way objects are created and selected/deselected based on upcoming changes to the Blender 2.80 Python API.
There's still a bug with the Blender OBJ import script, so this doesn't work yet. Waiting maybe for a 2.80 release candidate.

* Updated version information for Blender 2.80

* Updated blender version, addon loads without errors

There are still problems with creating a mesh sequence and selecting it.

* Update script for blender 2.8's modified API

* Fix calls to select_set()

Still broken: sequences with a single material, baking?

* Rename file, use correct collection for sequence baking

* Update README

* version bump

* Feature: reload sequence from disk (#16)

* Initial code for reloading sequences from disk

* Re-add the emptyMesh to the mesh_sequence_settings object

* Cleanup old meshes, early error if no files match, minor code refactor

* version bump

* Fixed broken PLY import

* Version bump, updated README

README.md

@@ -1,7 +1,9 @@
 # Stop-motion-OBJ
 A Blender add-on for importing a sequence of meshes as frames
 
-Stop motion OBJ allows you to import a sequence of OBJ (or STL or PLY) files and render them as individual frames. Have a RealFlow animation but want to render it in Blender? This addon is for you! Currently tested for Blender 2.79.1.
+Stop motion OBJ allows you to import a sequence of OBJ (or STL or PLY) files and render them as individual frames. Have a RealFlow animation but want to render it in Blender? This addon is for you! There are now two versions:
+- [v2.0.0](https://github.com/neverhood311/Stop-motion-OBJ/releases/tag/v2.0.0) for **Blender 2.80+**
+- [r1.1.1](https://github.com/neverhood311/Stop-motion-OBJ/releases/tag/0.2.79.2) for Blender 2.79 (also tested for 2.77 and 2.78). This version is now deprecated and will no longer be supported
 
 If you find this add-on helpful, please consider donating to support development:
 
@@ -19,6 +21,8 @@ PayPal: https://www.paypal.me/justinj
 - Supports shapes with UVs and image textures
 - Variable playback speed
 - Multiple playback modes
+- Reload from disk
+  - If you change your mesh sequence, you can reload the sequence into the existing object without deleting it and creating a new one
 - Object can have different materials on each frame
   - For instance, you can have a different MTL file for each OBJ file
 - Bake sequence
@@ -38,7 +42,7 @@ PayPal: https://www.paypal.me/justinj
   - Sequences can now be duplicated, but they share a material. For a duplicate sequence with a different material, you have to re-import the sequence.
 
 ## Installing Stop motion OBJ
-- Download mesh_sequence_controller.py and move it to Blender's addons folder (something like C:\Program Files\Blender Foundation\Blender\2.79\scripts\addons)
+- Download mesh_sequence_controller.py and move it to Blender's addons folder (something like C:\Program Files\Blender Foundation\Blender\2.80\scripts\addons)
 - Open Blender and open the Add-ons preferences (File > User Preferences... > Add-ons)
 - In the search bar, type 'OBJ' and look for the Stop motion OBJ addon in the list
 - Check the box to install it, and click 'Save User Settings'
@@ -50,7 +54,7 @@ PayPal: https://www.paypal.me/justinj
   - The object will initially be empty. We need to load a mesh sequence into it.
 - Make sure the object is selected.
 - In the properties panel, click on the Object Properties tab (the little orange cube icon). In the settings panel, scroll down to find the Mesh Sequence subpanel and open it.
-- Enter the Root Folder by clicking on the folder button and navigating to the folder where the mesh files are stored. **Make sure to UNCHECK ‘Relative Path’**
+- Enter the Root Folder by clicking on the folder button and navigating to the folder where the mesh files are stored. ~~**Make sure to UNCHECK ‘Relative Path’**~~
 - In the File Name box, enter a common prefix of the files.
   - ex: If you have frame001, frame002, frame003, you could enter ‘frame’, 'fram', or even 'f'
 - If your sequence has a different material for each frame, check the "Material per Frame" checkbox. Otherwise, leave it unchecked.
@@ -66,3 +70,6 @@ PayPal: https://www.paypal.me/justinj
 - Once your sequence is loaded, you can change the shading (smooth or flat) of the entire sequence:
   - The shading buttons are found in the Mesh Sequence Settings for the object
   - Note: The normal shading buttons (in the 3D View "Tools" panel) will only affect the current frame, not the entire sequence
+- If you change your mesh sequence and want to reload it without creating a new sequence object, click 'Reload From Disk'
+  - This will use the original Root Folder and File Name that you initially specified
+  - If your updated sequence has more or fewer frames than the original one, the updated sequence object will reflect this change