* Rename `lib/firebase/api-call` -> `lib/firebase/fn-call`
This relieves ambiguity now that we will be using our actual
public API in the client.
* Rewrite client API calls to createContract, placeBet
* Tiny fixup for client market creation code
* Configure functions module to allow absolute imports
* Convert common imports in functions to be absolute
* Convert common imports in web to be absolute
* Convert lib imports in web to be absolute
* Convert hooks imports in web to be absolute
* Convert components imports in web to be absolute
