Started some overview documentation of the HaaS.
Started some overview documentation of the HaaS.

For a very generous definition of "started." The intent is for this to
become something a new developer can read to get up to speed quickly.

kylehogan/hil,henn/haas,henn/hil_sahil,henn/hil,apoorvemohan/haas,CCI-MOC/haas,SahilTikale/haas,apoorvemohan/haas,kylehogan/haas,SahilTikale/switchHaaS,henn/hil,kylehogan/hil,lokI8/haas,meng-sun/hil,meng-sun/hil,henn/hil_sahil