Changed location of vendor specific thumbnail images of printers:

These images are newly stored inside the resources/profiles/VENDOR_NAME/,
they should be named by the printer_model identifier suffixed with
"_thumbnail.png"

All the existing printer thumbnails were moved and renamed,
thumbnails for the 3rd party printers were added, marked as Beta.

resources/profiles/LulzBot.idx

@@ -0,0 +1,2 @@
+min_slic3r_version = 2.2.0-alpha3
+0.0.1 Initial version

resources/profiles/LulzBot.ini

@@ -2,9 +2,9 @@
 
 [vendor]
 # Vendor name will be shown by the Config Wizard.
-name = Lulzbot
+name = LulzBot
 config_version = 0.0.1
-config_update_url = http://files.prusa3d.com/wp-content/uploads/repository/PrusaSlicer-settings-master/live/Lulzbot/
+config_update_url = http://files.prusa3d.com/wp-content/uploads/repository/PrusaSlicer-settings-master/live/LulzBot/
 
 [printer_model:MINI_AERO]
 name = Mini Aero