[view] add fiels ESR to view and attendnace_rate method output
[migration] add fields to ESR
[locale] ESR added methods
[model] esr#attendance_rate
[controller] permit more esr attributes
[spec/feature] ESR added columns
[migration] remove attedance_rate column
[model] add presence_days and attendance_rate methods to ESR
[spec/model] attendance_rate in ESR
:Merge branch 'master' of github.com:Genshin/gaku into add_fields_to_esr
[view] remove esr attendance rate from student extended search
[view] add student id number to esr
Merge pull request #273 from Genshin/add_fields_to_esr

[dont merge] Add fields to esr