splitting quorum into participant and quorum

initial participant organization
code 'makes'
remove common.go
add erasure to makefile, fix bugs
polish up package quorum
polish up package participant
repair cylindertree_test
patch quorum_test
clean errors from participant testing
fix remaming broken tests
restore most quorum features
bring full functionality back after the split

Conflicts:
	src/quorum/cylinder.go
add additional tests for entropy.go
clean documentation for entropy_test.go
add getters testing to sibling tests
remove quorum test file
split heartbeat tests and tick tests into their correct files
split signedheartbeat functions and structs into its own file
fix bug in TestCompilationTick
move AddScript to participant.go