Workaround for https://github.com/SmileyChris/easy-thumbnails/issues/388

[zsoobhan]

This is a workaround for my use case given the processors being used in my project were increasing the filename lengths to beyond 255 characters.

I separately added a small bit of .js to check for the length of file names when they are originally uploaded since the files being thumbnailed were uploaded by end users.

Changes the max_length on the models.File.name from 255 to 1023
Adds:

• django migration
• south migration

[aurimukas]

Hey!
I have exactly same problem.. and I've done exactly same thing (in my local/dev machine).. still I was thinking that using hashed names should be a cleaner solution (for me). the problem is that I've tried to define a different namer function still Thumbnails are being generated with a default namer function.. does anyone had this problem?