Strip exif data from uploaded images

Using `-strip` cli options from ImageMagick

http://www.imagemagick.org/script/command-line-options.php#strip

fix #85

Also upgrade react-redux to latest version. This is a performance update

Also, only update relative time every minute instead of 6 seconds. My bad

This prevents the undefined profile from being opened in the first place on such an error

Use consistent capitalization for subject lines

Update default devise wording to include reference to Mastodon

Fix #68

It can take as much as 0.5s if not longer to complete

production as it's very verbose and not very useful