introduce i18n-tasks gem with thoughtbot config
project specific changes to i18n-stask config
change to have an clean locale state
 Display global issue link only if necessary
split diff per file
introduce DiffsController
remove diff action from files controller
split diff computation into many small functions
add specs on DiffsController
add spaces around assignment operator
shorten line
clean the code, fix diff of first commit retrieval
introduce state module
rename download to fetching
using state model in all previous places
using helper method to determing state label
make changes according to hound
change oder of failed and done in states module
change code style according to style guide
change hound.yml according to the styleguide