Customize daguerre's directory path

[fitodic]

Construct the directory path where the adjusted images will be saved to using the MD5 hash algorithm.

Can be customized using the DAGUERRE_PATH setting set in the project's settings. If left unspecified, the default value will be used, i.e 'dg'. The maximum length of the specified string is 13 characters.

Example:

• Default: dg/ce/2b/7014c0bdbedea0e4f4bf.jpeg
• Custom (DAGUERRE_PATH = 'img'): img/ce/2b/7014c0bdbedea0e4f4bf.jpeg

Known issue: If the extracted hash string is 'ad', ad blockers will block the image. All occurrences of 'ad' will be replaced with 'ag' since the MD5 hash produces letters from 'a' to 'f'.

Other:

• Improve Unicode compatibility
• Test the _uploadto function

Connected to issue #102

A special thanks to @mislavcimpersak

[fitodic]

All your suggestions have been taken into consideration and implemented. I've added a section to the daguerre's documentation regarding the newly available custom setting.

[fitodic]

Thanks for the feedback! The following changes have been commited:

1. DEFAULT_ADJUSTED_IMAGE_PATH: The name of the local variable was changed according to the convention and to better match the model's name.
2. Documentation: Along with removing the trailing slash from the default value, the custom settings section was revised and simplified by adding a couple of examples.

[fitodic]

They typo was fixed and pushed.

[fitodic]

The daguerre clean management command and the tests covering it have been updated to reflect the newly introduced changes to the image path.

[melinath]

Merged, thanks for your hard work on this!

[fitodic]

My pleasure, thanks for your help!