Refreshes all changes textures. (check if timestamp is different)

Credit goes to nivalidea, for making the original Auto Refresh Textures script.

Install
• copy this python script to the path defined in maya env variable PYTHONPATH, then import as normal (example below)
  python "import refreshTextures";   /    "reload(refreshTextures)";
• source "refreshTextures.mel", and execute AutoRefreshTexture; (best stick this in a shelf)

History
• V1.0 - initial release

Bugs/Todo
• if one of the textures is missing, script won't execute properly

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