Fixed minor typo.
Fixed minor typos.
Remove references to slave

Instead of calling things slaves, either rename them to "nodes" or "followers",
depending on the context
Merge pull request #3930 from catsby/remove_slave

website: Remove references to slave
Merge pull request #3927 from rockymadden/master

Fixed minor typos.
Merge pull request #3926 from rockymadden/master

Fixed minor typo.