Merge pull request #74 from projectKUA/kubota

merge
under construction(ready for merge)
modify welcome view to disappear image tag in a info-window if the onsen doesnt have image file in DB
modify review dialog(not completely)
enables to upload review images and edit review scaffold files(not all)
add onsen.png
recover migration file missing
merge conflict on db/schema.rb
merge conflict
ref #67 Change map style in welcome index view
ref #68 Add bootstrap to application.html.erb
Change styles in qua form template