add :init param to INPUT, SELECT and TEXTAREA tags #112

          INPUT(type: :checkbox, init: true)
          INPUT(type: :radio, init: true)
          INPUT(type: :radio, init: false)
          SELECT(init: 'some value') do ...
          INPUT(type: :text, init: 'some value') 
          INPUT(init: 'some value') # same as type: :text
          TEXTAREA(init: 'some value')

    name = INPUT(type: :text, init: some_model_for_example.name)
    BUTTON { 'save' }.on(:click) { some_model_for_example.update name: jq[name].value }