added more instructions to get and build
added more instructions to get and build

gidden/cyclus.github.com,opotowsky/cyclus.github.com,rwcarlsen/cyclus.github.com,opotowsky/cyclus.github.com,opotowsky/cyclus.github.com,rwcarlsen/cyclus.github.com,rwcarlsen/cyclus.github.com,gidden/cyclus.github.com,gidden/cyclus.github.com