Added some novaclient exceptions to the pyrax.exceptions namespace to make it easier to handle them in applications that use pyrax.
Added some novaclient exceptions to the pyrax.exceptions namespace to make it easier to handle them in applications that use pyrax.

ddaeschler/pyrax,rackspace/pyrax,rackerlabs/heat-pyrax,mandx/pyrax,vikomall/pyrax,sivel/pyrax,briancurtin/pyrax,EdLeafe/pyrax,naemono/pyrax,opsdisk/pyrax,emonty/pyos,roelvv/pyrax,pratikmallya/pyrax,0dataloss/pyrax