[#65434852] Ranking Matrix
[#65434852] Rankings Controller
[#65434852] Add instance variable column_name to have access in the view
[#65434852] Default column names

Because VALID_NAMES it's very big
[#65434852] Ranking view
[#65434852] Columns names are symbols but the keys of the stats_hash
are strings
Merge remote-tracking branch 'origin/master' into 65434852-ranking
allow users to remove stats to override them
[#66594234] los permisos de escuela son para todos los usuarios con escuela habilitada
data_entry users can't sync
[#65434852] Installing jquery.tablesorter plugin
[#65434852] ranking table css
[#65434852] Initialize ranking table
add appsiganl gem
[#65434786] en i18n
[#65434852] merge to master
[#65434852] authorize access to ranking
update therubyracer to avoid SEGFAULT on deploy
Merge branch 'master' into 65434852-ranking
[#65434852] precompile rankings.js