moved longhair submodule to quorum
move common/erasure to quorum/erasure
remove common package entirely

Conflicts:
	Makefile
	src/client/client.go
	src/client/client_test.go
rename ZeroNetwork to DebugNetwork
underlying keys are no longer exported in siacrypto
refactor siacrypto
move longhair functions to erasure package
move longhair to erasure/longhair

Conflicts:
	Makefile
	src/erasure/longhair
update documentation within erasure package
more thorough error checking in siacrypto
cleaned documention in siacrypto
more thorough testing of signatures.go
basic testing for erasure package
switch to 9 pieces instead of 8
Update contact info
Add newline
Merge branch 'master' of github.com:NebulousLabs/Sia