Added errors on file size
Do not display rmagick exception in I18n message

For instance, if you upload a text file with a JPG extension, rmagick generate an exception, whose message contains the full path of your project directory. It seems to me that it's a security issue, since the generated message displayed to the frontoffice user contains the server project directory.
I didn't test other cases (for the orher messages), but potentially this problem can appear somewhere else
Do not retrieve disabled versions
Reset mounter cache on record reload
fix cache workfile collision between versions
change MiniMagick.convert to take an additional page number argument and add MiniMagick.convert_all_pages
Convert all pages when no page number is specified
.all.each is highly inefficient with many rows

According to http://guides.rubyonrails.org/active_record_querying.html, chapter 1.3, you should never use .all.each when iterating over the whole table.
Merge pull request #1438 from prasselpikachu/patch-1

.all.each is highly inefficient with many rows
Merge pull request #1399 from jvdp/versioned-workfile

Fix cache workfile collision between versions
Fix file delete being called twice on remove.

When a file is removed with something like `.remove_image = true` it's
seen as you replacing the file with a new file and still tries to delete
the "old file" even though the old file was just deleted. This is
mitigated in `CarrierWave::SanitizedFile#delete` by an `if exists?`
condition. But it's unnecessary and especially annoying when trying to
use a file storage API.
Change image extension when converting formats.
Merge pull request #1446 from nashby/change-file-extension

Change image extension when converting formats.
Fix bug with remove_previously_stored_#{column} callback, when updating in a transaction, and that process is rollback.
The old file will be delete, but the new file name can not store success into database.

## For example:

User.transaction do
  @user.avatar = new_file
  @user.save
  # new file stored
  # old file deleted with callback: remove_previously_stored_avatar
  # ... do bla bla
  raise ActiveRecord::Rollback
end
Make example in README more clear.
Merge pull request #1448 from mlaco/master

Make example in README more clear.
Remove fog version from the README.

closes #1443
Merge pull request #1449 from nashby/patch-1

Remove fog version from the README.
fixed typo in mini_magick.rb, missing end statement and wrong url to mini_magick github repo
Add the cache_only configuration option