Changes to make agoric --sdk basically work again

[michaelfig]

This fixes the bitrot that I introduced in modifying @agoric/eventual-send and @agoric/captp.

Now the template/contract/deploy.js script just needs modification. See the README for instructions on how to set up an agoric --sdk alias.

soil:template michael$ agoric deploy contract/deploy.js 
Chain loaded: chain bundle loaded
running /Users/michael/agoric/agoric-sdk/packages/agoric-cli/template/contract/deploy.js
'fs' is imported by contract/deploy.js, but could not be resolved – treating it as an external dependency
agoric: ERROR: data is not callable, has no method getAssay
soil:template michael$ 

[katelynsills]

Looks good to me! I'll look into the remaining error after lunch