General Lemmy support

[jwr1]

Lemmy API docs here

• [x] Comment viewing support: 069eb3700b93a9314d8976763b1c6b669b163d5a
• [x] Load magazine (community) details when the magazine specific page is opened: 29a337d4191f365ada54da4d418c4d4a84b90e2f
• [x] Load user details on user page (same as above): #24
• [x] Comment creation support: 21cf65a532ecade8c4fad34d15bcc01c8571179b
• [x] Add host back to lemmy user/magazine names when parsing model: e6a5a5d6e2e4d0fec38dc95a637eccffe0a0ac21
• [x] Search functionality: #25
• [x] Magazine sorting and filtering: 97cf4bfbfe6a52f543693be64254751c5814a3c3
• [x] Lemmy specific sorting options: #45
• [x] Post creation support: #28
• [ ] Notification viewing support
• [ ] Direct message support
• [x] Fix post editing and deleting: #48.