Add blob extractors
Configure device appropriately for B2G
Add bluedroid library bluetooth.default to hammerhead
Use 2.0 scale for Gaia assets

Gecko is actually using 2.0 scaling right now, so 1.5 isn't right. Bug 963929 will make gecko use 2.5x scaling.
Bug 978671 - B2G NFC: Add ro.moz.nfc.enabled system proprty to Nexus-5
(hammerhead)
Bug 1086712 - Don't bounce adb connection on boot with N4/N5. r=jld
Add init.b2g.rc to init.rc.