add finnish translation

add finnish translation

finnish translation

updated final translation

Still in progress. Should be done shortly

Fix typos and typography. Make vocabulary and grammar more uniform.

"Various apps are available" is now a hyperlink

Add ability to search accounts by display name

Text for link to other instances

to only those from local users; Add link to "extended information" to
getting started in the UI; Add defaults for posting privacy; Change
how publish button looks depending on posting privacy chosen

Federate spoiler_text using warning attribute on <content /> instead of a <category term="spoiler" />
Clean up schema file from accidental development migrations

application website validation, don't link to app website if website isn't set,
also comment out animated boost icon from #464 until it's consistent with non-animated version

A couple of places were using "reblog" rather than "boost" - this updates them to match the web UI