Create a dylan branch for folks not on master

[challinan]

Should resolve this error:

$ bb whatdepends sysvinit
Traceback (most recent call last):
  File "/scratch/sandbox/bb/libexec/bb-whatdepends", line 8, in <module>
    import bbcmd
  File "/scratch/sandbox/bb/libexec/bbcmd.py", line 22, in <module>
    from bb.cookerdata import CookerConfiguration, ConfigParameters
ImportError: No module named cookerdata