Cycle ads.

Fix the ad counter example so the advertisements are cycled through,
one at a time, per server/client.
Add foldl.

Add prototype version of foldl, which operates purely over grow-only
set structures by generating operations for a given source object.
Spawn foldl.

Spawn foldl in another process, which is recursive to keep updating
between the two data structures.
Return type information.

Return type information with a read request.
Add strint inflation; resolve nasty bug.

Add a test for strict inflations over G-Sets.  In addition, resolve a
nasty bug where the Value pattern match in the receive was only
matching a bind to the same value, and not a greater value in the
lattice.
Make the foldl block on threshold.

Rewrite the foldl in terms of a threshold read operation on a strict
inflation from current state.
Rename fold to select.

Rename the fold operation to be a select operation; this makes the
operations semantics a bit clearer.
Clarify inflation checks.

Clarify the inflation checking code, in both documentation and
implementation.
Ignore generated documentation.
Convert vnode to use ets backend.

Convert the vnode to use the ets backend for performing the read
operation.
Move bind to backend.

Move the bind operation from the vnode into the backend, and abstract
out the key generation code.
Next uses derflow_ets.

Modify the next function to use the implementation defined in
derflow_ets.
Bump Dialyzer files.
Change is_det API.

Normalize the is_det API to be in line with the rest of the language
API.
Add documentation.
Add local notifications for bindings.

Add local notifications for any bindings that may exist.
Abstract notify function.

Abstract the notify function out, so the virtual node can notify
non-local variables of changes.
Implement notify_value and wait_needed.

Implement the notify_value call used for partially bound variables, and
implement the wait_needed primitive in derflow_ets.
Reduce complexity.

Reduce complexity of the reply_fetch function by removing unnecessary
code path.
Extract fetch.

Extract fetch out into derflow_ets.