prevent users from uploading files other than images
make post actions (likes, flags) translatable as whole sentences
add UploadsController specs
keep French l10n up to date
Merge pull request #632 from ZogStriP/keep-french-l10n-up-to-date-2013-04-03

keep French l10n up to date
Merge pull request #631 from kubabrecka/cs_update27

cs translation update
Merge pull request #622 from ZogStriP/prevent-users-from-uploading-files-other-than-images

prevent users from uploading files other than images
Minor change to text
Merge pull request #628 from ZogStriP/add-uploads-controller-specs

add UploadsController specs
Merge pull request #627 from kubabrecka/translatable_flags_and_likes

make post actions (likes, flags) translatable as whole sentences