Transition to MastoAPI: composing new status and media upload

Closes #435 (closed)

I left out no_attachment_links property since it is not related to posting. (discussed with Lain via slack)

changed the description

added 2 commits

• 083f8d4b - Set default parameter
• f9d7ce97 - Get correct mimetype through entity_normalizer

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resolved all discussions

added 1 commit

• 9291f2dc - Add fallback for attachments uploaded via the other platforms

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looks good

added 58 commits

• 9291f2dc...01d05316 - 54 commits from branch pleroma:develop
• 98023446 - Switch to mastoapi for posting status and uploading media
• 966add1b - Set default parameter
• 909c315a - Get correct mimetype through entity_normalizer
• 6fdbc182 - Add fallback for attachments uploaded via the other platforms

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Other than that it's impossible to post anything with attachments right now, works good too. Fix that and it's a merge.

added 1 commit

• 932652e3 - Update attachment normalizer

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resolved all discussions

updated.

merged

mentioned in commit 153ad570