Squashed 'floo/common/' changes from c5c00cc..295e18e

295e18e merge
915591e add back the old status line about where we are connected
324cd0a save bufs on room info if we fetched them
cdb8ba6 fixed not syncing files at start
2aba767 Abstract everything.
67a9a5d Minor cleanup
f18111d Add a setting so that people can disable mirrored saves
3a6eb90 Prevent ignored things from being added accidentally by people who open and save them.
49c5b8f Throw git commands in readme.

git-subtree-dir: floo/common
git-subtree-split: 295e18ec68c16342bd3219c2b48a31ca1b63f4a2
merged the common code with that from master