0.4a0

• Documentation now lives at https://django-sql-dashboard.readthedocs.io/ (#36)
• Ability to copy and paste TSV from the default table display. (#29)
• Fixed two bugs with the way count links in column headers work. (#31, #32)
• New permissions system: a saved dashboard can now be made public, private, unlisted, group-only, staff-only or superuser-only. (#27)