e10s-plugins will not merge to mozilla-central any more

I've decided not to "merge" the plugin changes from electrolysis to 
mozilla-central any more. The gymnastics necessary were good for the initial 
commit to preserve blame, but are creating more confusion than help now.

Checkins to OOPP now need to happen in mozilla-central. Feel free to land 
them first in the Electrolysis branch if you'd like to get additional 
testing. Normal review rules apply in either case.

After pushing changes to mozilla-central, please also update this wiki page:

https://wiki.mozilla.org/Plugins/OOPP_Branch_Tracking

I'm using this page to track all the changes necessary for OOPP so that they 
can be backported to Firefox "Lorentz", the stable release scheduled for 
early next year which will come from the 1.9.2 branch.

--BDS