Feature/file uploads

[germain-italic]

Depends on #90

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This PR is finally bringing file uploads to Cruddiy!

Long story short, it works exactly as you'd expect:

Check the columns you want to use for File upload:

Select a file from your computer in Create:

Link to the upload in View:

Link to upload in List:

Link to the upload and checkbox to delete it in Update:

The good stuff:

• If you update the record without selecting a new file, we preserve the existing file
• If you update the record and upload a new file, we delete the old file from the disk
• If you delete a file from the Update view, we delete the file from the disk
• If you delete a record, we also delete the files
• Filenames are sanitized of ambiguous characters
• Filenames are prepended with a unique string to avoid duplicates
• A dummy index.php is automatically created in the upload folder to avoid directory listing

The extras:

• Upload-related features are part of the Behat suite
• Only non-primary char, varchar, text, blob types can be designated as File uploads
• If a column from your DB contains one of these strings, the File uploads checkbox will ticked by default: file, image, logo, picture, photo, pdf, jpg, gif, png, zip
• The default upload max size is 5 MB, can be changed in config.php
• A huge list of extensions is forbidden by default for security (.php, .sh, .bin, etc), can be changed in config.php
• The upload directory is core/app/uploads, can be changed in config.php
• Unless you change it in config.php, the uploads directory will be preserved when you regenerate the CRUD files

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Unrelated, but also in this PR

• 94c6248 • Refreshed and explained the Visibility checkboxes layout and titles according to proposal on PR #64
  • Help text as tooltip on visibility columns titles
  • Column keys id, name, reference are checked by default
  • Tables whose columns are not referenced as foreign keys into another table, do not display the "Related tables" visibility checkboxes
• e591913 • Missing pagination translation
• a5ee14d • Copied tests logging function from PR #93 before it is merged
• 3c9e137 • Regenerate locales on CRUD regeneration
• 269bbac • Made it more easy to swtich language in config file
• 9c41220 • Run tests in chrome browser without selenium (need to update tests doc)
• 82cbc13, 56ae616, 9b33bbb • Moved indexfile.php, readfile.php, updatefile.php, createfile.php huge Heredoc variables into separate templates
• ce45578 • Make print_error_if_exists work with arrays of errors

[jan-vandenberg]

Wow, absolutely amazing work!

As discussed in another PR I just sent you a link to become a collaborator, so can you merge these and other PRs.

Thanks for being excellent!

[germain-italic]

Thanks @jan-vandenberg, with great power comes great responsibility!