Django updates and new upload spinner

Pulled in some PRs to update for latest Django versions, added loading spinner from @jeloagnasin

Unique image upload option and bugfixes

Merge pull request #98 from timmyomahony/develop

Image upload PR and bugfix PRs

Fixed issue with JavaScript

#90

Fixed manifest

2.1.2

Update MANIFEST.in (#89)

Fixed deployment static paths

There was an issue with some of the paths in the deployment

Added Image uploads and updated Django versions

Finally, better late then never, you can now upload images

Simplified the widget

Newer LTS versions of Django made it easy to drop a lot of legacy code and vastly simplify the widget, making the codebase easier to read and improve upon.

Updated for Django 2.1 along with other small changes

1.0.6

Merge branch 'develop'

Made some bug fixes from pull requests

Merged a number of pull requests and fixed issues (#63)

* Make media on AdminPagedownWidget lazy

This avoids resolving static files on import which may fail if
static files are not in manifest when using ManifestStaticFilesStorage.

* Include super media in AdminPagedownWidget media property

* Lazily handle media for Django 1.10+

* Cleaned up comments

* Cleaned up comments

* Address #60

* Fix HTML Preview Label

* Update the example code to support Django2.0

Version 1.0.3

Added fixed for Django 1.11