* Create FilterSync, which gives us an API inside of the chain project to sync filters with
Add another unit test to filter sync
Add more unit tests for ChainSync and FilterSync
Clean up some docs, remove some extra lines of code
Run scalafmt
Add filter-sync.md
Cleanup some nits
Add more information of how FilterSync.syncFilters() works
Add 'FilterWithHeaderHash' type so that we can actually validate/verify block headers that are being fed into the chain project
Run scalafmt, hide imports in filter-sync.md so code appears cleaner
Move implicits out of invisible block as it seems to cause errors
Make it so FilterSync processes filters in batches rather than fetching them all at once
Fix compile error
* Add comment about trust model
* Run scalafmt
* Make imports in chain.md invisible
* Hide imports in wallet.md
* Make all core module md files imports hidden
* Cleanup imports on rpc markdown docs
* Try and figure weird travis behavior
* Get rid of uneeded nest qualifiers on mdoc
