Add RDO to Planet OpenStack

Change-Id: I10224adfa53b22daed65e486018f60f0eeb9f61a
Adds face for RDO. Fixes face for rbowen.

Change-Id: I8374839953260af8b474688a73ac1cb05abee014
Missed the rdo icon/face in the last commit

Change-Id: I02bf3d274a298c2e588a07ff8aca4e2e81bdd7ac
Move rdo image to images dir

Change-Id: If9054ffd9d616e70e69863bc9aef7b4adfc23a77
change UnitedStack's blog category

Change-Id: I9172f90dda280f24457ae49a9cb9c9e4fe55dd92
Merge "change UnitedStack's blog category"