prevent users from uploading files other than images
make post actions (likes, flags) translatable as whole sentences
add UploadsController specs
cs translation update
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