set default perms as strings in perms plugin itself
set default perms as strings in perms plugin itself

I originally changed them to octal in my py3 branch,
but they are gonna end up as strings anyways, so I figured we should
just use them that way by default.

shamangeorge/beets,lengtche/beets,sampsyo/beets,sampsyo/beets,diego-plan9/beets,Kraymer/beets,beetbox/beets,SusannaMaria/beets,diego-plan9/beets,jackwilsdon/beets,shamangeorge/beets,lengtche/beets,pkess/beets,sampsyo/beets,artemutin/beets,MyTunesFreeMusic/privacy-policy,beetbox/beets,shamangeorge/beets,madmouser1/beets,SusannaMaria/beets,xsteadfastx/beets,sampsyo/beets,lengtche/beets,MyTunesFreeMusic/privacy-policy,xsteadfastx/beets,ibmibmibm/beets,mosesfistos1/beetbox,xsteadfastx/beets,diego-plan9/beets,Kraymer/beets,Kraymer/beets,mosesfistos1/beetbox,jackwilsdon/beets,jcoady9/beets,Kraymer/beets,lengtche/beets,pkess/beets,jcoady9/beets,artemutin/beets,pkess/beets,mosesfistos1/beetbox,pkess/beets,madmouser1/beets,madmouser1/beets,xsteadfastx/beets,artemutin/beets,madmouser1/beets,beetbox/beets,jcoady9/beets,jackwilsdon/beets,ibmibmibm/beets,shamangeorge/beets,ibmibmibm/beets,diego-plan9/beets,jackwilsdon/beets,mosesfistos1/beetbox,ibmibmibm/beets,SusannaMaria/beets,MyTunesFreeMusic/privacy-policy,MyTunesFreeMusic/privacy-policy,SusannaMaria/beets,beetbox/beets,jcoady9/beets,artemutin/beets