Closes #1105: Be able to download all files with annotations

 - addition of the action 'download_zip' in ResultController
 - modification of the style to do not add a 'return' in the form
 - addition of the button 'Download all files' linked with the
'annotation' checkbox
Fix bug UI in browse

In reference with (PR) #1116 wich leave a bug in the display.
Closes #1124: Problems with importations

 - modification of the mistake
added tests
Merge pull request #1129 from GhiGt/bug-ui

Fix bug UI in browse
Merge pull request #1123 from GhiGt/issue-1105

Closes #1105: Be able to download all files with annotations
Merge pull request #1130 from GhiGt/issue-1124

Closes #1124: Problems with importations