correctly handle new wallets vs. wallets being added during synchronization
move sectorupdateevent functions to own file
rename SectorSettings to Sector
switch update atoms to being auto-computed
move sector update events to inside of the wallet
autorepair scaffolding
finish linking repair structures
VerifyStorageProof now calls ProofLocation()
proofLocation() no longer exported
cli experience clean up
debugging statements - won't appear during normal use
Merge pull request #209 from DavidVorick/repair

Fully Functioning, Lightly Tested
remove size.go
move SafeFilename to create.go

also, switch to URL encoding
simplify DownloadSector with ioutil.ReadFile
make RSEncode take byte slices instead of io.Writers
add siafiles/util.go
add siafiles/scratch.go