Fixed bug upgrading requirements.json to new format
Fixed bug upgrading requirements.json to new format

Error was:

  File "/usr/local/lib/python3.2/dist-packages/zeroinstall/apps.py", line 296, in get_requirements
    assert not values.extra_restrictions
AttributeError: 'dict' object has no attribute 'extra_restrictions'

bhilton/0install,jaychoo/0install,bastianeicher/0install,gasche/0install,pombreda/0install,bartbes/0install,gfxmonk/0install,HoMeCracKeR/0install,DarkGreising/0install,afb/0install,gasche/0install,gasche/0install,fdopen/0install,0install/0install,DarkGreising/0install,0install/0install,jaychoo/0install,dbenamy/0install,fdopen/0install,afb/0install,gasche/0install,gfxmonk/0install,bartbes/0install,HoMeCracKeR/0install,HoMeCracKeR/0install,bartbes/0install,afb/0install,bastianeicher/0install,dbenamy/0install,afb/0install,0install/0install,DarkGreising/0install,gfxmonk/0install,bhilton/0install,jaychoo/0install,bhilton/0install,pombreda/0install,dbenamy/0install,bastianeicher/0install,fdopen/0install,pombreda/0install