Property and class autocompletion

[ljos]

Complete properties and classes.

Look into:

• Company-mode
• Linked Open Vocabularies API
• ~~autocomplete-mode~~

Acceptance criteria

• [ ] Complete properties
• [ ] Complete classes
• [ ] Use Linked Open Vocabularies API to complete

Optional

• [ ] Company mode plugin
• [ ] User-defined properties
• [ ] User-defined classes
• [ ] Auto-detect properties in user-defined triple store
• ~~autocomplete-mode plugin~~

Comments

Will implement with company-mode first. Maybe I will also look into auto-complete-mode, but it is a lot of work supporting both.