add validation for driver license number
rename mechanic driver license number field
rename Motor license name to Motor Mechanic's License

replace label for mechanic_license_number(Motor license number) with "Motor Mechanic's License" too
admin mechanic edit page add field into mechanic license section

add field for repair work classes and tradesperson cerificates
add type string for :years_as_a_mechanic field

I did it because Andrew wrote - 'Remove the addition and subtraction arrows in the "Number of years as a mechanic section" textbox'
admin edit mechanic page add save button into top bar
update motor mechanic license and driver license sections

update naming after discussion with Borisa
add validation for years_as_a_mechanic

numericality: only_integer: true, allowed_blank: true
fixes after code review

fix mechanic_create_spec
fix naming and typos
Merge pull request #88 from laudeego/em-admin-page-edit-mechanic-page-first-version

Em admin page edit mechanic page first version