more tests, new Makefile

## stocktwits activity streams

added new test module for ACS stocktwits. finished previously-started structure option for same parser. added sample data file to existing `data/` dir.

## Makefile

moved existing Makefile (from Sphinx) to repo base and updated doc gen paths accordingly. added "tests" target to Makefile for easy `unittest` autodiscovery from the repo base.

## assorted

updated all file paths to sample data for tests. now will only work when run from repo base (ideally via `make`).