Amethyst v0.17.0: Long live Amethyst

Several improvements to memory use to avoid OutOfMemmory crashes.

- Filters out the duplicated-message type of Spam

- Fixes Reply not showing up in the Thread View after the user posts a new note

- Adds Reports Tab to Profile Page

- Separates Notes from Replies in the Profile Page

- Significantly improves the speed of the Follower calculation

- Decreased User/Note object size -> 4x more objects can fit in memory.

- Prunes memory to 1000 messages per public channel

- Improves the speed of rendering long threads and thread-level calculation

- Fixes Quoted Post appearing as a Reply

- Fixes Mutex state when Android kills threads.

- Refactors current filter classes into Relay filters and Screen filters

- Moves Notification Dot calculation to background threads.

- Loads new Posts on the Thread view on the fly