Merge branch 'hotfix/0.7.5.4'
Add a common object to avoid code duplucation beetween Status and Contributions types
Remove no longer needed code
Use mailing preview window to display mailing details in the history; fixes #717
Bump version
Superadmin can't set numerous members fields; fixes #721
Update changelog
Merge branch 'hotfix/0.7.5.5' into develop
CSV imports; fixes #176
Fix bad variable name (thanks to Roland)
Fix uplaod error message displayed even if we did not try to upload anything
Use file_info function when available
fileinfo PHP extension is required for CSV imports
Prevent issue on PDFModels when they've already been initialized
Fix Status and ContributionsTypes initialization
Properly display error at install if PDFModels initilization fails
Fix empty creation date issue