puavo-web: fix code indentation
puavo-web: fix html
puavo-web: Mountpoint module for device and school
puavo-web: add path, mountpoint and options attribute to Mountpoint
puavo-web: fix mountpoint saving
puavo-web: refactor test code
puavo-web: save mountpoint by json
puavo-web: mounpoints for the device edit page
puavo-web: add mountpoints to the device show page
puavo-web: link for appeding more line for the mountpoints form
puavo-web: fine-tune UI
puavo-web: include Mountpoint to School class
puavo-web: refactor
puavo-web: refactor
puavo-web: add mounpoints to the school page
puavo-web: do not save empty values
puavo-rest: add mountpoint to device resource
puavo-rest: fallback for mounpoints by school
puavo-rest: merge device's and school's mountpoints
puavo-rest: refactor