refactor to extract category logic to a single file
refactor torque generator
torque category wizard
updated cdb module
fixed form updating dynamic columns
enabled legends for torque
upcated cartodb.js torque bundle
added  preview for wizard
small details in wizard form order
fixed specs
fixed validation for torque wizards
Merge remote-tracking branch 'origin/master' into CDB-3483
Merge remote-tracking branch 'origin/upgrade-extension' into CDB-3483
don't allow string values in number columns
allow wrapped queries in torque layers
Merge remote-tracking branch 'origin/master' into CDB-3483
fixed tipsy crahsing CDB-4012
fixed problem with columns with a single value CDB-4019
fixed wizard position CDB-4015
Merge remote-tracking branch 'origin/master' into CDB-3483