Remove annoying console.log

• Remove extraneous "parsing..." console.log statement
• Deprecate repmInvoker param to Replicache (it's still present though), in favor of new wasmModule param. This just allows you to pass the string path of the module, rather than wrapping it in the REPMWasmInvoker constructor.

Correctly fire getDataLayerAuth

• bugfix: getDataLayerAuth wasn't being fired when data layer returns 401
• Revert the change that removed diff-server from SDK as that was useful, at least until it's easier to use the production diff-server
• lots of work on lit-todo sample

75% perf increase to scan

v0.4.0

Bump version to 0.4.0

v0.3.0

• 65% speed increase of scan
• Updated benchmark to use more realistic data - https://github.com/rocicorp/replicache-sdk-js/pull/115/commits
• Re-fire subscriptions when mutations happen in other tabs
• Add Replicache.scanAll() convenience method (does the async iteration for you)
• Add new todo-lit sample based on lit-html and es6
• Remove list() and drop() APIs as not very compatible with indexeddb