Allow attachment model attributes extension

The configuration now defines the fillable attributes for the attachment model.

The configuration must be published in order to customize this setting.

Dependencies version update

0.0.12

Bump php-uuid requirement version

Fix file deletion on custom storage disk

Resolves issue #6

Share attachements via temporary link

Merge pull request #5 from bnbwebexpertise/shareable

adds creation of shareable links with inbuilt expiry mechanism

Remove large index for older MySQL

0.0.9

Remove large index for older MySQL

Permit to add options when attach file to a model

Thanks to Simone Pessotto 3092d2b

Improve dropzone endpoint errors output

0.0.7

Return errors message as text

Fix filetype column size

The filetype column size was too short for long mime names.

Improve dropzone endpoint

Added dropzone events and dropzone delete endpoint.

Use external UUID generator

0.0.3

UUID v4 via external lib