"highcharts" JavaScript library.
Deleted "public/index" file.
Gemfile with 'spreadsheet' gem.
Excel file with flats data.
Excel file with 'house' data.
Migration file for 'house' model.
Routes file with routes to 'houses', 'from_excell' and root_path.
File 'application.rb' with require 'iconv' for HighCarts.
Layout file 'application' wich includes 'highcharts'.
House model.
Helper file for 'house' model.
Changed file 'Gemfile.lock'.
Function 'from_excell' downloads data from excell file.
Flats helper has function which returns number of problems for every house.
Function 'number_of_problems' returns array to draw chart.
Index page with chart.