make context a global static as we'll be moving away from instance binding
make context a global static as we'll be moving away from instance binding

I talked to Colin and he suggested that the only real reason he could think
of where one would want multiple context objects is for sandboxing e.g. in
a browser where each tab would have their own context for security reasons.

so, for us multiple context instances do not make much sense

locusf/plasma-pa,locusf/plasma-pa,locusf/plasma-pa,locusf/plasma-pa,locusf/plasma-pa